{
  "complexity_1": {
    "sentences": [
      {
        "id": "complexity_1_sentence_1",
        "sentence": "The dog that the mailman startled barked.",
        "structure": [
          {
            "subject": "dog",
            "action": "barked",
            "object": null
          },
          {
            "subject": "mailman",
            "action": "startled",
            "object": "dog"
          }
        ],
        "middle_entity": "dog",
        "all_entities": [
          "mailman",
          "dog"
        ],
        "questions_by_entity": {
          "mailman": [
            {
              "question": "What did the mailman do?",
              "answer": "startle the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the mailman?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the mailman do?",
              "answer": "barked",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mailman's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mailman's involvement?",
              "answer": "the dog barked",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mailman",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "bark",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "Who startled the dog?",
              "answer": "the mailman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "barked",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the mailman startling the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_2",
        "sentence": "The cat that the mouse evaded pounced.",
        "structure": [
          {
            "subject": "cat",
            "action": "pounced",
            "object": null
          },
          {
            "subject": "mouse",
            "action": "evaded",
            "object": "cat"
          }
        ],
        "middle_entity": "cat",
        "all_entities": [
          "cat",
          "mouse"
        ],
        "questions_by_entity": {
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "pounce",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What evaded the cat?",
              "answer": "the mouse",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was evaded do?",
              "answer": "pounced",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the mouse evading the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            }
          ],
          "mouse": [
            {
              "question": "What did the mouse do?",
              "answer": "evade the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the mouse?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the mouse do?",
              "answer": "pounced",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mouse's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mouse's involvement?",
              "answer": "the cat pounced",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mouse",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_3",
        "sentence": "The deer that the wolf chased ran.",
        "structure": [
          {
            "subject": "deer",
            "action": "ran",
            "object": null
          },
          {
            "subject": "wolf",
            "action": "chased",
            "object": "deer"
          }
        ],
        "middle_entity": "deer",
        "all_entities": [
          "deer",
          "wolf"
        ],
        "questions_by_entity": {
          "deer": [
            {
              "question": "What did the deer do?",
              "answer": "run",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "deer",
              "is_middle_entity": true
            },
            {
              "question": "What chased the deer?",
              "answer": "the wolf",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "deer",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "deer",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "ran",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "deer",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the deer's action?",
              "answer": "the wolf chasing the deer",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "deer",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the deer's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "deer",
              "is_middle_entity": true
            }
          ],
          "wolf": [
            {
              "question": "What did the wolf do?",
              "answer": "chase the deer",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the wolf?",
              "answer": "the deer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the wolf do?",
              "answer": "ran",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the wolf's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the wolf's involvement?",
              "answer": "the deer ran",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_4",
        "sentence": "The tuna that the shark attacked swam away.",
        "structure": [
          {
            "subject": "tuna",
            "action": "swam away",
            "object": null
          },
          {
            "subject": "shark",
            "action": "attacked",
            "object": "tuna"
          }
        ],
        "middle_entity": "tuna",
        "all_entities": [
          "shark",
          "tuna"
        ],
        "questions_by_entity": {
          "shark": [
            {
              "question": "What did the shark do?",
              "answer": "attack the tuna",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the shark?",
              "answer": "the tuna",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the shark do?",
              "answer": "swam away",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the shark's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the shark's involvement?",
              "answer": "the tuna swam away",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "shark",
              "is_middle_entity": false
            }
          ],
          "tuna": [
            {
              "question": "What did the tuna do?",
              "answer": "swim away",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "tuna",
              "is_middle_entity": true
            },
            {
              "question": "What attacked the tuna?",
              "answer": "the shark",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "tuna",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "tuna",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was attacked do?",
              "answer": "swam away",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "tuna",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the tuna's action?",
              "answer": "the shark attacking the tuna",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "tuna",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the tuna's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "tuna",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_5",
        "sentence": "The mechanic that the car frustrated fixed it.",
        "structure": [
          {
            "subject": "mechanic",
            "action": "it",
            "object": null
          },
          {
            "subject": "car",
            "action": "fixed",
            "object": "mechanic"
          }
        ],
        "middle_entity": "mechanic",
        "all_entities": [
          "mechanic",
          "car"
        ],
        "questions_by_entity": {
          "mechanic": [
            {
              "question": "What did the mechanic do?",
              "answer": "fixed the car",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mechanic",
              "is_middle_entity": true
            },
            {
              "question": "What frustrated the mechanic?",
              "answer": "the car",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mechanic",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mechanic",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that frustrated do?",
              "answer": "fixed the car",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mechanic",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the mechanic's action?",
              "answer": "the car frustrating the mechanic",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mechanic",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the mechanic's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mechanic",
              "is_middle_entity": true
            }
          ],
          "car": [
            {
              "question": "What did the car do?",
              "answer": "frustrate the mechanic",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "car",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the car?",
              "answer": "the mechanic",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "car",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "car",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the car do?",
              "answer": "fixed the car",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "car",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the car's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "car",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the car's involvement?",
              "answer": "the mechanic fixed the car ",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "car",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_6",
        "sentence": "The rabbit that the fox caught squealed.",
        "structure": [
          {
            "subject": "rabbit",
            "action": "squealed",
            "object": null
          },
          {
            "subject": "fox",
            "action": "caught",
            "object": "rabbit"
          }
        ],
        "middle_entity": "rabbit",
        "all_entities": [
          "fox",
          "rabbit"
        ],
        "questions_by_entity": {
          "fox": [
            {
              "question": "What did the fox do?",
              "answer": "catch the rabbit",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the fox?",
              "answer": "the rabbit",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the fox do?",
              "answer": "squealed",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the fox's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the fox's involvement?",
              "answer": "the rabbit squealed",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": false
            }
          ],
          "rabbit": [
            {
              "question": "What did the rabbit do?",
              "answer": "squeal",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "rabbit",
              "is_middle_entity": true
            },
            {
              "question": "What caught the rabbit?",
              "answer": "the fox",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "rabbit",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "rabbit",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "squealed",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "rabbit",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the rabbit's action?",
              "answer": "the fox catching the rabbit",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "rabbit",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the rabbit's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "rabbit",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_7",
        "sentence": "The actor that the director cast rehearsed.",
        "structure": [
          {
            "subject": "actor",
            "action": "rehearsed",
            "object": null
          },
          {
            "subject": "director",
            "action": "cast",
            "object": "actor"
          }
        ],
        "middle_entity": "actor",
        "all_entities": [
          "actor",
          "director"
        ],
        "questions_by_entity": {
          "actor": [
            {
              "question": "What did the actor do?",
              "answer": "rehearse",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "actor",
              "is_middle_entity": true
            },
            {
              "question": "Who cast the actor?",
              "answer": "the director",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "actor",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "actor",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was cast do?",
              "answer": "rehearsed",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "actor",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the actor's action?",
              "answer": "the director casting the actor",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "actor",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the actor's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "actor",
              "is_middle_entity": true
            }
          ],
          "director": [
            {
              "question": "What did the director do?",
              "answer": "cast the actor",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "director",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the director?",
              "answer": "the actor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "director",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "director",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the director do?",
              "answer": "rehearsed",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "director",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the director's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "director",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the director's involvement?",
              "answer": "the actor rehearsed",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "director",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_8",
        "sentence": "The mouse that the owl spotted froze.",
        "structure": [
          {
            "subject": "mouse",
            "action": "froze",
            "object": null
          },
          {
            "subject": "owl",
            "action": "spotted",
            "object": "mouse"
          }
        ],
        "middle_entity": "mouse",
        "all_entities": [
          "mouse",
          "owl"
        ],
        "questions_by_entity": {
          "mouse": [
            {
              "question": "What did the mouse do?",
              "answer": "freeze",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mouse",
              "is_middle_entity": true
            },
            {
              "question": "What spotted the mouse?",
              "answer": "the owl",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mouse",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mouse",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was spotted do?",
              "answer": "froze",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mouse",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the mouse's action?",
              "answer": "the owl spotting the mouse",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mouse",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the mouse's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mouse",
              "is_middle_entity": true
            }
          ],
          "owl": [
            {
              "question": "What did the owl do?",
              "answer": "spot the mouse",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "owl",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the owl?",
              "answer": "the mouse",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "owl",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "owl",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the owl do?",
              "answer": "froze",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "owl",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the owl's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "owl",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the owl's involvement?",
              "answer": "the mouse froze",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "owl",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_9",
        "sentence": "The goat that the wolf targeted fled.",
        "structure": [
          {
            "subject": "goat",
            "action": "fled",
            "object": null
          },
          {
            "subject": "wolf",
            "action": "targeted",
            "object": "goat"
          }
        ],
        "middle_entity": "goat",
        "all_entities": [
          "goat",
          "wolf"
        ],
        "questions_by_entity": {
          "goat": [
            {
              "question": "What did the goat do?",
              "answer": "flee",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "goat",
              "is_middle_entity": true
            },
            {
              "question": "What targeted the goat?",
              "answer": "the wolf",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "goat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "goat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was targeted do?",
              "answer": "fled",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "goat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the goat's action?",
              "answer": "the wolf targeting the goat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "goat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the goat's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "goat",
              "is_middle_entity": true
            }
          ],
          "wolf": [
            {
              "question": "What did the wolf do?",
              "answer": "target the goat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the wolf?",
              "answer": "the goat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the wolf do?",
              "answer": "fled",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the wolf's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the wolf's involvement?",
              "answer": "the goat fled",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_10",
        "sentence": "The beetle that the crow pecked at flew off.",
        "structure": [
          {
            "subject": "beetle",
            "action": "flew off",
            "object": null
          },
          {
            "subject": "crow",
            "action": "pecked at",
            "object": "beetle"
          }
        ],
        "middle_entity": "beetle",
        "all_entities": [
          "beetle",
          "crow"
        ],
        "questions_by_entity": {
          "beetle": [
            {
              "question": "What did the beetle do?",
              "answer": "fly off",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "beetle",
              "is_middle_entity": true
            },
            {
              "question": "What pecked at the beetle?",
              "answer": "the crow",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "beetle",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "beetle",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was pecked at do?",
              "answer": "flew off",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "beetle",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the beetle's action?",
              "answer": "the crow pecking at the beetle",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "beetle",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the beetle's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "beetle",
              "is_middle_entity": true
            }
          ],
          "crow": [
            {
              "question": "What did the crow do?",
              "answer": "peck at the beetle",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "crow",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the crow?",
              "answer": "the beetle",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "crow",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "crow",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the crow do?",
              "answer": "flew off",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "crow",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the crow's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "crow",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the crow's involvement?",
              "answer": "the beetle flew off",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "crow",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_11",
        "sentence": "The politician that the journalist questioned responded.",
        "structure": [
          {
            "subject": "politician",
            "action": "responded",
            "object": null
          },
          {
            "subject": "journalist",
            "action": "questioned",
            "object": "politician"
          }
        ],
        "middle_entity": "politician",
        "all_entities": [
          "journalist",
          "politician"
        ],
        "questions_by_entity": {
          "journalist": [
            {
              "question": "What did the journalist do?",
              "answer": "question the politician",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "journalist",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the journalist?",
              "answer": "the politician",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "journalist",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "journalist",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the journalist do?",
              "answer": "responded",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "journalist",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the journalist's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "journalist",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the journalist's involvement?",
              "answer": "the politician responded",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "journalist",
              "is_middle_entity": false
            }
          ],
          "politician": [
            {
              "question": "What did the politician do?",
              "answer": "respond",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "politician",
              "is_middle_entity": true
            },
            {
              "question": "Who questioned the politician?",
              "answer": "the journalist",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "politician",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "politician",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was questioned do?",
              "answer": "responded",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "politician",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the politician's action?",
              "answer": "the journalist questioning the politician",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "politician",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the politician's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "politician",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_12",
        "sentence": "The car that the truck hit spun out.",
        "structure": [
          {
            "subject": "car",
            "action": "spun out",
            "object": null
          },
          {
            "subject": "truck",
            "action": "hit",
            "object": "car"
          }
        ],
        "middle_entity": "car",
        "all_entities": [
          "truck",
          "car"
        ],
        "questions_by_entity": {
          "truck": [
            {
              "question": "What did the truck do?",
              "answer": "hit the car",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "truck",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the truck?",
              "answer": "the car",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "truck",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "truck",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the truck do?",
              "answer": "spun out",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "truck",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the truck's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "truck",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the truck's involvement?",
              "answer": "the car spun out",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "truck",
              "is_middle_entity": false
            }
          ],
          "car": [
            {
              "question": "What did the car do?",
              "answer": "spin out",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "car",
              "is_middle_entity": true
            },
            {
              "question": "What hit the car?",
              "answer": "the truck",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "car",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "car",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was hit do?",
              "answer": "spun out",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "car",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the car's action?",
              "answer": "the truck hitting the car",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "car",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the car's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "car",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_13",
        "sentence": "The bear that the hunter tracked roared.",
        "structure": [
          {
            "subject": "bear",
            "action": "roared",
            "object": null
          },
          {
            "subject": "hunter",
            "action": "tracked",
            "object": "bear"
          }
        ],
        "middle_entity": "bear",
        "all_entities": [
          "hunter",
          "bear"
        ],
        "questions_by_entity": {
          "hunter": [
            {
              "question": "What did the hunter do?",
              "answer": "track the bear",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the hunter?",
              "answer": "the bear",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the hunter do?",
              "answer": "roared",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the hunter's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the hunter's involvement?",
              "answer": "the bear roared",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            }
          ],
          "bear": [
            {
              "question": "What did the bear do?",
              "answer": "roar",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": true
            },
            {
              "question": "Who tracked the bear?",
              "answer": "the hunter",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was tracked do?",
              "answer": "roared",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the bear's action?",
              "answer": "the hunter tracking the bear",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the bear's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_14",
        "sentence": "The sheep that the dog herded bleated.",
        "structure": [
          {
            "subject": "sheep",
            "action": "bleated",
            "object": null
          },
          {
            "subject": "dog",
            "action": "herded",
            "object": "sheep"
          }
        ],
        "middle_entity": "sheep",
        "all_entities": [
          "sheep",
          "dog"
        ],
        "questions_by_entity": {
          "sheep": [
            {
              "question": "What did the sheep do?",
              "answer": "bleat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "sheep",
              "is_middle_entity": true
            },
            {
              "question": "What herded the sheep?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "sheep",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "sheep",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was herded do?",
              "answer": "bleated",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "sheep",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the sheep's action?",
              "answer": "the dog herding the sheep",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "sheep",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the sheep's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "sheep",
              "is_middle_entity": true
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "herd the sheep",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the dog?",
              "answer": "the sheep",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the dog do?",
              "answer": "bleated",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the sheep bleated",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_15",
        "sentence": "The spider that the fly dodged spun a web.",
        "structure": [
          {
            "subject": "spider",
            "action": "web",
            "object": null
          },
          {
            "subject": "fly",
            "action": "spun",
            "object": "spider"
          }
        ],
        "middle_entity": "spider",
        "all_entities": [
          "spider",
          "fly"
        ],
        "questions_by_entity": {
          "spider": [
            {
              "question": "What did the spider do?",
              "answer": "spun a web",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": true
            },
            {
              "question": "What dodged the spider?",
              "answer": "the fly",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was dodged do?",
              "answer": "spun a web",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the spider's action?",
              "answer": "the fly dodging the spider",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the spider's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": true
            }
          ],
          "fly": [
            {
              "question": "What did the fly do?",
              "answer": "dodged the spider",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the fly?",
              "answer": "the spider",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the fly do?",
              "answer": "spun a web",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the fly's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the fly's involvement?",
              "answer": "the spider spun a web",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fly",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_16",
        "sentence": "The elephant that the lioness charged trumpeted.",
        "structure": [
          {
            "subject": "elephant",
            "action": "trumpeted",
            "object": null
          },
          {
            "subject": "lioness",
            "action": "charged",
            "object": "elephant"
          }
        ],
        "middle_entity": "elephant",
        "all_entities": [
          "lioness",
          "elephant"
        ],
        "questions_by_entity": {
          "lioness": [
            {
              "question": "What did the lioness do?",
              "answer": "charge the elephant",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "lioness",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the lioness?",
              "answer": "the elephant",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "lioness",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "lioness",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the lioness do?",
              "answer": "trumpeted",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "lioness",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the lioness's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "lioness",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the lioness's involvement?",
              "answer": "the elephant trumpeted",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "lioness",
              "is_middle_entity": false
            }
          ],
          "elephant": [
            {
              "question": "What did the elephant do?",
              "answer": "trumpet",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "elephant",
              "is_middle_entity": true
            },
            {
              "question": "What charged the elephant?",
              "answer": "the lioness",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "elephant",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "elephant",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was charged do?",
              "answer": "trumpeted",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "elephant",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the elephant's action?",
              "answer": "the lioness charging the elephant",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "elephant",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the elephant's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "elephant",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_17",
        "sentence": "The motorcycle that the car cut off swerved.",
        "structure": [
          {
            "subject": "motorcycle",
            "action": "swerved",
            "object": null
          },
          {
            "subject": "car",
            "action": "cut off",
            "object": "motorcycle"
          }
        ],
        "middle_entity": "motorcycle",
        "all_entities": [
          "motorcycle",
          "car"
        ],
        "questions_by_entity": {
          "motorcycle": [
            {
              "question": "What did the motorcycle do?",
              "answer": "swerve",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "motorcycle",
              "is_middle_entity": true
            },
            {
              "question": "What cut off the motorcycle?",
              "answer": "the car",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "motorcycle",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "motorcycle",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was cut off do?",
              "answer": "swerved",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "motorcycle",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the motorcycle's action?",
              "answer": "the car cutting off the motorcycle",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "motorcycle",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the motorcycle's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "motorcycle",
              "is_middle_entity": true
            }
          ],
          "car": [
            {
              "question": "What did the car do?",
              "answer": "cut off the motorcycle",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "car",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the car?",
              "answer": "the motorcycle",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "car",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "car",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the car do?",
              "answer": "swerved",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "car",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the car's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "car",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the car's involvement?",
              "answer": "the motorcycle swerved",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "car",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_18",
        "sentence": "The teacher that the principal appointed taught.",
        "structure": [
          {
            "subject": "teacher",
            "action": "taught",
            "object": null
          },
          {
            "subject": "principal",
            "action": "appointed",
            "object": "teacher"
          }
        ],
        "middle_entity": "teacher",
        "all_entities": [
          "teacher",
          "principal"
        ],
        "questions_by_entity": {
          "teacher": [
            {
              "question": "What did the teacher do?",
              "answer": "teach",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "teacher",
              "is_middle_entity": true
            },
            {
              "question": "Who appointed the teacher?",
              "answer": "the principal",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "teacher",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "teacher",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was appointed do?",
              "answer": "taught",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "teacher",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the teacher's action?",
              "answer": "the principal appointing the teacher",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "teacher",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the teacher's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "teacher",
              "is_middle_entity": true
            }
          ],
          "principal": [
            {
              "question": "What did the principal do?",
              "answer": "appoint the teacher",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the principal?",
              "answer": "the teacher",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the principal do?",
              "answer": "taught",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the principal's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the principal's involvement?",
              "answer": "the teacher taught",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "principal",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_19",
        "sentence": "The bee that the bird swooped at buzzed.",
        "structure": [
          {
            "subject": "bee",
            "action": "buzzed",
            "object": null
          },
          {
            "subject": "bird",
            "action": "swooped at",
            "object": "bee"
          }
        ],
        "middle_entity": "bee",
        "all_entities": [
          "bee",
          "bird"
        ],
        "questions_by_entity": {
          "bee": [
            {
              "question": "What did the bee do?",
              "answer": "buzz",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bee",
              "is_middle_entity": true
            },
            {
              "question": "What swooped at the bee?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bee",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bee",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was swooped at do?",
              "answer": "buzzed",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bee",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the bee's action?",
              "answer": "the bird swooping at the bee",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bee",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the bee's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bee",
              "is_middle_entity": true
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "swoop at the bee",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the bird?",
              "answer": "the bee",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the bird do?",
              "answer": "buzzed",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the bee buzzed",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_20",
        "sentence": "The rat that the snake slithered towards hid.",
        "structure": [
          {
            "subject": "rat",
            "action": "hid",
            "object": null
          },
          {
            "subject": "snake",
            "action": "slithered towards",
            "object": "rat"
          }
        ],
        "middle_entity": "rat",
        "all_entities": [
          "snake",
          "rat"
        ],
        "questions_by_entity": {
          "snake": [
            {
              "question": "What did the snake do?",
              "answer": "slither towards the rat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the snake?",
              "answer": "the rat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the snake do?",
              "answer": "hid",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the snake's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the snake's involvement?",
              "answer": "the rat hid",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            }
          ],
          "rat": [
            {
              "question": "What did the rat do?",
              "answer": "hide",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "rat",
              "is_middle_entity": true
            },
            {
              "question": "What slithered towards the rat?",
              "answer": "the snake",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "rat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "rat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was slithered towards do?",
              "answer": "hid",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "rat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the rat's action?",
              "answer": "the snake slithering towards the rat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "rat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the rat's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "rat",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_21",
        "sentence": "The fox that the hound chased yelped.",
        "structure": [
          {
            "subject": "fox",
            "action": "yelped",
            "object": null
          },
          {
            "subject": "hound",
            "action": "chased",
            "object": "fox"
          }
        ],
        "middle_entity": "fox",
        "all_entities": [
          "hound",
          "fox"
        ],
        "questions_by_entity": {
          "hound": [
            {
              "question": "What did the hound do?",
              "answer": "chase the fox",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "hound",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the hound?",
              "answer": "the fox",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "hound",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "hound",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the hound do?",
              "answer": "yelped",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "hound",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the hound's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "hound",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the hound's involvement?",
              "answer": "the fox yelped",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "hound",
              "is_middle_entity": false
            }
          ],
          "fox": [
            {
              "question": "What did the fox do?",
              "answer": "yelp",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What chased the fox?",
              "answer": "the hound",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "yelped",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the fox's action?",
              "answer": "the hound chasing the fox",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the fox's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_22",
        "sentence": "The squirrel that the raccoon surprised scampered up a tree.",
        "structure": [
          {
            "subject": "squirrel",
            "action": "tree",
            "object": null
          },
          {
            "subject": "raccoon",
            "action": "scampered up",
            "object": "squirrel"
          }
        ],
        "middle_entity": "squirrel",
        "all_entities": [
          "raccoon",
          "squirrel"
        ],
        "questions_by_entity": {
          "raccoon": [
            {
              "question": "What did the raccoon do?",
              "answer": "surprise the squirrel",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "raccoon",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the raccoon?",
              "answer": "the squirrel",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "raccoon",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "raccoon",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the raccoon do?",
              "answer": "scamper up the squirrel",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "raccoon",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the raccoon's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "raccoon",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the raccoon's involvement?",
              "answer": "the squirrel scampered up a tree",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "raccoon",
              "is_middle_entity": false
            }
          ],
          "squirrel": [
            {
              "question": "What did the squirrel do?",
              "answer": "scamper up a tree",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "squirrel",
              "is_middle_entity": true
            },
            {
              "question": "What surprised the squirrel",
              "answer": "the raccoon",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "squirrel",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "squirrel",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was surprised do?",
              "answer": "scampered up a tree",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "squirrel",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the squirrel's action?",
              "answer": "the raccoon surprising the squirrel",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "squirrel",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the squirrel's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "squirrel",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_23",
        "sentence": "The skunk that the cougar cornered sprayed.",
        "structure": [
          {
            "subject": "skunk",
            "action": "sprayed",
            "object": null
          },
          {
            "subject": "cougar",
            "action": "cornered",
            "object": "skunk"
          }
        ],
        "middle_entity": "skunk",
        "all_entities": [
          "cougar",
          "skunk"
        ],
        "questions_by_entity": {
          "cougar": [
            {
              "question": "What did the cougar do?",
              "answer": "corner the skunk",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cougar",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the cougar?",
              "answer": "the skunk",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cougar",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cougar",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the cougar do?",
              "answer": "sprayed",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cougar",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cougar's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cougar",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cougar's involvement?",
              "answer": "the skunk sprayed",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cougar",
              "is_middle_entity": false
            }
          ],
          "skunk": [
            {
              "question": "What did the skunk do?",
              "answer": "spray",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "skunk",
              "is_middle_entity": true
            },
            {
              "question": "What cornered the skunk?",
              "answer": "the cougar",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "skunk",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "skunk",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was cornered do?",
              "answer": "sprayed",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "skunk",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the skunk's action?",
              "answer": "the cougar cornering the skunk",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "skunk",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the skunk's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "skunk",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_24",
        "sentence": "The frog that the snake targeted jumped.",
        "structure": [
          {
            "subject": "frog",
            "action": "jumped",
            "object": null
          },
          {
            "subject": "snake",
            "action": "targeted",
            "object": "frog"
          }
        ],
        "middle_entity": "frog",
        "all_entities": [
          "frog",
          "snake"
        ],
        "questions_by_entity": {
          "frog": [
            {
              "question": "What did the frog do?",
              "answer": "jump",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "frog",
              "is_middle_entity": true
            },
            {
              "question": "What targeted the frog?",
              "answer": "the snake",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "frog",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "frog",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was targeted do?",
              "answer": "jumped",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "frog",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the frog's action?",
              "answer": "the snake targeting the frog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "frog",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the frog's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "frog",
              "is_middle_entity": true
            }
          ],
          "snake": [
            {
              "question": "What did the snake do?",
              "answer": "target the frog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the snake?",
              "answer": "the frog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the snake do?",
              "answer": "jumped",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the snake's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the snake's involvement?",
              "answer": "the frog jumped",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_25",
        "sentence": "The ladybug that the bird targeted flew away.",
        "structure": [
          {
            "subject": "ladybug",
            "action": "flew away",
            "object": null
          },
          {
            "subject": "bird",
            "action": "targeted",
            "object": "ladybug"
          }
        ],
        "middle_entity": "ladybug",
        "all_entities": [
          "ladybug",
          "bird"
        ],
        "questions_by_entity": {
          "ladybug": [
            {
              "question": "What did the ladybug do?",
              "answer": "fly away",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "ladybug",
              "is_middle_entity": true
            },
            {
              "question": "What targeted the ladybug?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "ladybug",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "ladybug",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was targeted do?",
              "answer": "flew away",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "ladybug",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the ladybug's action?",
              "answer": "the bird targeting the ladybug",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "ladybug",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the ladybug's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "ladybug",
              "is_middle_entity": true
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "target the ladybug",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the bird?",
              "answer": "the ladybug",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the bird do?",
              "answer": "flew away",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the ladybug flew away",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_26",
        "sentence": "The butterfly that the child tried to catch fluttered away.",
        "structure": [
          {
            "subject": "butterfly",
            "action": "fluttered away",
            "object": null
          },
          {
            "subject": "child",
            "action": "tried to catch",
            "object": "butterfly"
          }
        ],
        "middle_entity": "butterfly",
        "all_entities": [
          "child",
          "butterfly"
        ],
        "questions_by_entity": {
          "child": [
            {
              "question": "What did the child do?",
              "answer": "try to catch the butterfly",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the child?",
              "answer": "the butterfly",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the child do?",
              "answer": "fluttered away",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the child's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the child's involvement?",
              "answer": "the butterfly fluttered away",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": false
            }
          ],
          "butterfly": [
            {
              "question": "What did the butterfly do?",
              "answer": "flutter away",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "butterfly",
              "is_middle_entity": true
            },
            {
              "question": "Who tried to catch the butterfly?",
              "answer": "the child",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "butterfly",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "butterfly",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was tried to catch do?",
              "answer": "fluttered away",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "butterfly",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the butterfly's action?",
              "answer": "the child trying to catch the butterfly",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "butterfly",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the butterfly's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "butterfly",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_27",
        "sentence": "The whale that the shark circled dove deep.",
        "structure": [
          {
            "subject": "whale",
            "action": "dove deep",
            "object": null
          },
          {
            "subject": "shark",
            "action": "circled",
            "object": "whale"
          }
        ],
        "middle_entity": "whale",
        "all_entities": [
          "whale",
          "shark"
        ],
        "questions_by_entity": {
          "whale": [
            {
              "question": "What did the whale do?",
              "answer": "dove deep",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "whale",
              "is_middle_entity": true
            },
            {
              "question": "What circled the whale?",
              "answer": "the shark",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "whale",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "whale",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was circled do?",
              "answer": "dove deep",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "whale",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the whale's action?",
              "answer": "the shark circling the whale",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "whale",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the whale's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "whale",
              "is_middle_entity": true
            }
          ],
          "shark": [
            {
              "question": "What did the shark do?",
              "answer": "circled the whale",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the shark?",
              "answer": "the whale",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the shark do?",
              "answer": "dove deep",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the shark's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the shark's involvement?",
              "answer": "the whale dove deep",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "shark",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_28",
        "sentence": "The zebra that the lioness stalked bolted.",
        "structure": [
          {
            "subject": "zebra",
            "action": "bolted",
            "object": null
          },
          {
            "subject": "lioness",
            "action": "stalked",
            "object": "zebra"
          }
        ],
        "middle_entity": "zebra",
        "all_entities": [
          "lioness",
          "zebra"
        ],
        "questions_by_entity": {
          "lioness": [
            {
              "question": "What did the lioness do?",
              "answer": "stalk the zebra",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "lioness",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the lioness?",
              "answer": "the zebra",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "lioness",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "lioness",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the lioness do?",
              "answer": "bolted",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "lioness",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the lioness's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "lioness",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the lioness's involvement?",
              "answer": "the zebra bolted",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "lioness",
              "is_middle_entity": false
            }
          ],
          "zebra": [
            {
              "question": "What did the zebra do?",
              "answer": "bolt",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "zebra",
              "is_middle_entity": true
            },
            {
              "question": "What stalked the zebra?",
              "answer": "the lioness",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "zebra",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "zebra",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was stalked do?",
              "answer": "bolted",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "zebra",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the zebra's action?",
              "answer": "the lioness stalking the zebra",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "zebra",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the zebra's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "zebra",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_29",
        "sentence": "The snake that the mongoose attacked coiled.",
        "structure": [
          {
            "subject": "snake",
            "action": "coiled",
            "object": null
          },
          {
            "subject": "mongoose",
            "action": "attacked",
            "object": "snake"
          }
        ],
        "middle_entity": "snake",
        "all_entities": [
          "snake",
          "mongoose"
        ],
        "questions_by_entity": {
          "snake": [
            {
              "question": "What did the snake do?",
              "answer": "coil",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What attacked the snake?",
              "answer": "the mongoose",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was attacked do?",
              "answer": "coiled",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the snake's action?",
              "answer": "the mongoose attacking the snake",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the snake's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": true
            }
          ],
          "mongoose": [
            {
              "question": "What did the mongoose do?",
              "answer": "attack the snake",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mongoose",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the mongoose?",
              "answer": "the snake",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mongoose",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mongoose",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the mongoose do?",
              "answer": "coiled",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mongoose",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mongoose's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mongoose",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mongoose's involvement?",
              "answer": "the snake coiled",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mongoose",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 12
      },
      {
        "id": "complexity_1_sentence_30",
        "sentence": "The leopard that the gazelle saw sprinted.",
        "structure": [
          {
            "subject": "leopard",
            "action": "sprinted",
            "object": null
          },
          {
            "subject": "gazelle",
            "action": "saw",
            "object": "leopard"
          }
        ],
        "middle_entity": "leopard",
        "all_entities": [
          "leopard",
          "gazelle"
        ],
        "questions_by_entity": {
          "leopard": [
            {
              "question": "What did the leopard do?",
              "answer": "sprint",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "leopard",
              "is_middle_entity": true
            },
            {
              "question": "What saw the leopard?",
              "answer": "the gazelle",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "leopard",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "leopard",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "sprinted",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "leopard",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the leopard's action?",
              "answer": "the gazelle seeing the leopard",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "leopard",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the leopard's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "leopard",
              "is_middle_entity": true
            }
          ],
          "gazelle": [
            {
              "question": "What did the gazelle do?",
              "answer": "see the leopard",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "gazelle",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the gazelle?",
              "answer": "the leopard",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "gazelle",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "2",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "gazelle",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the gazelle do?",
              "answer": "sprinted",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "gazelle",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the gazelle's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "gazelle",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the gazelle's involvement?",
              "answer": "the leopard sprinted",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "gazelle",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 12
      }
    ],
    "total_questions": 366,
    "entities_processed": 61,
    "middle_entities_flagged": 30
  },
  "complexity_2": {
    "sentences": [
      {
        "id": "complexity_2_sentence_1",
        "sentence": "The cat that the dog that the boy adopted chased meowed.",
        "structure": [
          {
            "subject": "cat",
            "action": "meowed",
            "object": null
          },
          {
            "subject": "dog",
            "action": "chased",
            "object": "cat"
          },
          {
            "subject": "boy",
            "action": "adopted",
            "object": "dog"
          }
        ],
        "middle_entity": "dog",
        "all_entities": [
          "cat",
          "dog",
          "boy"
        ],
        "questions_by_entity": {
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "meow",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What chased the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "meowed",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the boy adopting the dog which led to the dog chasing the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "chase the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "Who adopted the dog?",
              "answer": "the boy",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was adopted do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the boy adopting the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat meowed",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            }
          ],
          "boy": [
            {
              "question": "What did the boy do?",
              "answer": "adopt the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the boy?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the boy do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the boy's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the boy's involvement?",
              "answer": "the dog chased the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_2",
        "sentence": "The ant that the spider that the bird spotted trapped crawled.",
        "structure": [
          {
            "subject": "ant",
            "action": "crawled",
            "object": null
          },
          {
            "subject": "spider",
            "action": "trapped",
            "object": "ant"
          },
          {
            "subject": "bird",
            "action": "spotted",
            "object": "spider"
          }
        ],
        "middle_entity": "spider",
        "all_entities": [
          "spider",
          "ant",
          "bird"
        ],
        "questions_by_entity": {
          "spider": [
            {
              "question": "What did the spider do?",
              "answer": "trap the ant",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": true
            },
            {
              "question": "What spotted the spider?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was spotted do?",
              "answer": "trapped the ant",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the spider's action?",
              "answer": "the bird spotting the spider",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the spider's involvement?",
              "answer": "the ant crawled",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": true
            }
          ],
          "ant": [
            {
              "question": "What did the ant do?",
              "answer": "crawl",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "What trapped the ant?",
              "answer": "the spider",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was trapped do?",
              "answer": "crawled",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the ant's action?",
              "answer": "the bird spotting the spider which led to the spider trapping the ant",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the ant's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "ant",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "spot the spider",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the bird?",
              "answer": "the spider",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the bird do?",
              "answer": "trapped the ant",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the spider trapped the ant",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_3",
        "sentence": "The bicycle that the car that the truck hit bumped fell over.",
        "structure": [
          {
            "subject": "bicycle",
            "action": "fell over",
            "object": null
          },
          {
            "subject": "car",
            "action": "bumped",
            "object": "bicycle"
          },
          {
            "subject": "truck",
            "action": "hit",
            "object": "car"
          }
        ],
        "middle_entity": "car",
        "all_entities": [
          "truck",
          "bicycle",
          "car"
        ],
        "questions_by_entity": {
          "truck": [
            {
              "question": "What did the truck do?",
              "answer": "hit the car",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "truck",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the truck?",
              "answer": "the car",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "truck",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "truck",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the truck do?",
              "answer": "bumped the bicycle",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "truck",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the truck's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "truck",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the truck's involvement?",
              "answer": "the car bumped the bicycle",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "truck",
              "is_middle_entity": false
            }
          ],
          "bicycle": [
            {
              "question": "What did the bicycle do?",
              "answer": "fall over",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bicycle",
              "is_middle_entity": false
            },
            {
              "question": "What bumped the bicycle?",
              "answer": "the car",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bicycle",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bicycle",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was bumped do?",
              "answer": "fell over",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bicycle",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bicycle's action?",
              "answer": "the truck hitting the car which led to the car bumping the bicycle",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bicycle",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bicycle's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bicycle",
              "is_middle_entity": false
            }
          ],
          "car": [
            {
              "question": "What did the car do?",
              "answer": "bump the bicycle",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "car",
              "is_middle_entity": true
            },
            {
              "question": "What hit the car?",
              "answer": "the truck",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "car",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "car",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was hit do?",
              "answer": "bumped the bicycle",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "car",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the car's action?",
              "answer": "the truck hitting the car",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "car",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the car's involvement?",
              "answer": "the bicycle fell over",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "car",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_4",
        "sentence": "The goat that the horse that the farmer fed kicked bleated.",
        "structure": [
          {
            "subject": "goat",
            "action": "bleated",
            "object": null
          },
          {
            "subject": "horse",
            "action": "kicked",
            "object": "goat"
          },
          {
            "subject": "farmer",
            "action": "fed",
            "object": "horse"
          }
        ],
        "middle_entity": "horse",
        "all_entities": [
          "goat",
          "horse",
          "farmer"
        ],
        "questions_by_entity": {
          "goat": [
            {
              "question": "What did the goat do?",
              "answer": "bleat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "goat",
              "is_middle_entity": false
            },
            {
              "question": "What kicked the goat?",
              "answer": "the horse",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "goat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "goat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was kicked do?",
              "answer": "bleated",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "goat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the goat's action?",
              "answer": "the farmer feeding the horse which led to the horse kicking the goat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "goat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the goat's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "goat",
              "is_middle_entity": false
            }
          ],
          "horse": [
            {
              "question": "What did the horse do?",
              "answer": "kick the goat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "horse",
              "is_middle_entity": true
            },
            {
              "question": "Who fed the horse?",
              "answer": "the farmer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "horse",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "horse",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was fed do?",
              "answer": "kicked the goat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "horse",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the horse's action?",
              "answer": "the farmer feeding the horse",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "horse",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the horse's involvement?",
              "answer": "the goat bleated",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "horse",
              "is_middle_entity": true
            }
          ],
          "farmer": [
            {
              "question": "What did the farmer do?",
              "answer": "feed the horse",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the farmer?",
              "answer": "the horse",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the farmer do?",
              "answer": "kicked the goat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the farmer's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the farmer's involvement?",
              "answer": "the horse kicked the goat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "farmer",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_5",
        "sentence": "The mouse that the cat that the dog scared ran squeaked.",
        "structure": [
          {
            "subject": "mouse",
            "action": "squeaked",
            "object": null
          },
          {
            "subject": "cat",
            "action": "ran",
            "object": "mouse"
          },
          {
            "subject": "dog",
            "action": "scared",
            "object": "cat"
          }
        ],
        "middle_entity": "cat",
        "all_entities": [
          "cat",
          "mouse",
          "dog"
        ],
        "questions_by_entity": {
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "run after the mouse",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What scared the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "ran after the mouse",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the dog scaring the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the mouse squeaked",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            }
          ],
          "mouse": [
            {
              "question": "What did the mouse do?",
              "answer": "squeak",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What ran after the mouse?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was run after do?",
              "answer": "squeaked",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mouse's action?",
              "answer": "the dog scaring the cat which led to the cat running after the mouse",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mouse's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mouse",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "scare the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the dog?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the dog do?",
              "answer": "ran after the mouse",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat ran after the mouse",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_6",
        "sentence": "The bee that the bird that the snake followed chased buzzed.",
        "structure": [
          {
            "subject": "bee",
            "action": "buzzed",
            "object": null
          },
          {
            "subject": "bird",
            "action": "chased",
            "object": "bee"
          },
          {
            "subject": "snake",
            "action": "followed",
            "object": "bird"
          }
        ],
        "middle_entity": "bird",
        "all_entities": [
          "bee",
          "snake",
          "bird"
        ],
        "questions_by_entity": {
          "bee": [
            {
              "question": "What did the bee do?",
              "answer": "buzz",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bee",
              "is_middle_entity": false
            },
            {
              "question": "What chased the bee?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bee",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bee",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "buzzed",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bee",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bee's action?",
              "answer": "the snake following the bird which led to the bird chasing the bee",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bee",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bee's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bee",
              "is_middle_entity": false
            }
          ],
          "snake": [
            {
              "question": "What did the snake do?",
              "answer": "follow the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the snake?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the snake do?",
              "answer": "chased the bee",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the snake's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the snake's involvement?",
              "answer": "the bird chased the bee",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "chase the bee",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What followed the bird?",
              "answer": "the snake",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was followed do?",
              "answer": "chased the bee",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the snake following the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the bee buzzed",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_7",
        "sentence": "The clerk that the manager that the CEO hired reprimanded worked diligently.",
        "structure": [
          {
            "subject": "clerk",
            "action": "diligently",
            "object": null
          },
          {
            "subject": "manager",
            "action": "worked",
            "object": "clerk"
          },
          {
            "subject": "ceo",
            "action": "reprimanded",
            "object": "manager"
          }
        ],
        "middle_entity": "manager",
        "all_entities": [
          "clerk",
          "ceo",
          "manager"
        ],
        "questions_by_entity": {
          "clerk": [
            {
              "question": "What did the clerk do?",
              "answer": "worked diligently",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "clerk",
              "is_middle_entity": false
            },
            {
              "question": "Who reprimanded the clerk?",
              "answer": "the manager",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "clerk",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "clerk",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was reprimanded do?",
              "answer": "worked diligently",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "clerk",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the clerk's action?",
              "answer": "the ceo hiring the manager which led to the manager reprimanding the clerk",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "clerk",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the clerk's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "clerk",
              "is_middle_entity": false
            }
          ],
          "ceo": [
            {
              "question": "What did the ceo do?",
              "answer": "hired the manager",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "ceo",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the ceo?",
              "answer": "the manager",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "ceo",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "ceo",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the ceo do?",
              "answer": "reprimanded the clerk",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "ceo",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the ceo's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "ceo",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the ceo's involvement?",
              "answer": "the manager reprimanded the clerk",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "ceo",
              "is_middle_entity": false
            }
          ],
          "manager": [
            {
              "question": "What did the manager do?",
              "answer": "reprimand the clerk",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "manager",
              "is_middle_entity": true
            },
            {
              "question": "Who hired the manager?",
              "answer": "the ceo",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "manager",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "manager",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was hired do?",
              "answer": "reprimanded the clerk",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "manager",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the manager's action?",
              "answer": "the ceo hiring the manager",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "manager",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the manager's involvement?",
              "answer": "the clerk worked diligently",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "manager",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_8",
        "sentence": "The boat that the ship that the storm wrecked nudged drifted.",
        "structure": [
          {
            "subject": "boat",
            "action": "drifted",
            "object": null
          },
          {
            "subject": "ship",
            "action": "nudged",
            "object": "boat"
          },
          {
            "subject": "storm",
            "action": "wrecked",
            "object": "ship"
          }
        ],
        "middle_entity": "ship",
        "all_entities": [
          "boat",
          "ship",
          "storm"
        ],
        "questions_by_entity": {
          "boat": [
            {
              "question": "What did the boat do?",
              "answer": "drifted",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "boat",
              "is_middle_entity": false
            },
            {
              "question": "What nudged the boat?",
              "answer": "the ship",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "boat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "boat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was nudged do?",
              "answer": "drifted",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "boat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the boat's action?",
              "answer": "the storm wrecked the ship which led to the ship nudging the boat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "boat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the boat's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "boat",
              "is_middle_entity": false
            }
          ],
          "ship": [
            {
              "question": "What did the ship do?",
              "answer": "nudged the boat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "ship",
              "is_middle_entity": true
            },
            {
              "question": "What wrecked the ship?",
              "answer": "the storm",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "ship",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "ship",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was wrecked do?",
              "answer": "nudged the boat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "ship",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the ship's action?",
              "answer": "the storm wrecked the ship",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "ship",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the ship's involvement?",
              "answer": "the boat drifted",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "ship",
              "is_middle_entity": true
            }
          ],
          "storm": [
            {
              "question": "What did the storm do?",
              "answer": "wrecked the ship",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "storm",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the storm?",
              "answer": "the ship",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "storm",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "storm",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the storm do?",
              "answer": "nudged the boat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "storm",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the storm's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "storm",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the storm's involvement?",
              "answer": "the ship nudged the boat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "storm",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_9",
        "sentence": "The rabbit that the fox that the bear scared startled hopped away.",
        "structure": [
          {
            "subject": "rabbit",
            "action": "hopped away",
            "object": null
          },
          {
            "subject": "fox",
            "action": "startled",
            "object": "rabbit"
          },
          {
            "subject": "bear",
            "action": "scared",
            "object": "fox"
          }
        ],
        "middle_entity": "fox",
        "all_entities": [
          "fox",
          "rabbit",
          "bear"
        ],
        "questions_by_entity": {
          "fox": [
            {
              "question": "What did the fox do?",
              "answer": "startle the rabbit",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What scared the fox?",
              "answer": "the bear",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "startled the rabbit",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the fox's action?",
              "answer": "the bear scaring the fox",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the fox's involvement?",
              "answer": "the rabbit hopped away",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": true
            }
          ],
          "rabbit": [
            {
              "question": "What did the rabbit do?",
              "answer": "hop away",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What startled the rabbit?",
              "answer": "the fox",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "hopped away",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the rabbit's action?",
              "answer": "the bear scaring the fox which led to the fox startling the rabbit",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the rabbit's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "rabbit",
              "is_middle_entity": false
            }
          ],
          "bear": [
            {
              "question": "What did the bear do?",
              "answer": "scare the fox",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the bear?",
              "answer": "the fox",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the bear do?",
              "answer": "startled the rabbit",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bear's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bear's involvement?",
              "answer": "the fox startled the rabbit",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_10",
        "sentence": "The fly that the spider that the bird chased caught escaped.",
        "structure": [
          {
            "subject": "fly",
            "action": "escaped",
            "object": null
          },
          {
            "subject": "spider",
            "action": "caught",
            "object": "fly"
          },
          {
            "subject": "bird",
            "action": "chased",
            "object": "spider"
          }
        ],
        "middle_entity": "spider",
        "all_entities": [
          "bird",
          "spider",
          "fly"
        ],
        "questions_by_entity": {
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "chase the spider",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the bird?",
              "answer": "the spider",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the bird do?",
              "answer": "caught the fly",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the spider caught the fly",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "spider": [
            {
              "question": "What did the spider do?",
              "answer": "catch the fly",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": true
            },
            {
              "question": "What chased the spider?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "caught the fly",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the spider's action?",
              "answer": "the bird chasing the spider",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the spider's involvement?",
              "answer": "the fly escaped",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": true
            }
          ],
          "fly": [
            {
              "question": "What did the fly do?",
              "answer": "escape",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What caught the fly?",
              "answer": "the spider",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "escaped",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the fly's action?",
              "answer": "the bird chasing the spider which led to the spider catching the fly",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the fly's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fly",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_11",
        "sentence": "The carpenter that the engineer that the architect consulted hired worked meticulously.",
        "structure": [
          {
            "subject": "carpenter",
            "action": "meticulously",
            "object": null
          },
          {
            "subject": "engineer",
            "action": "worked",
            "object": "carpenter"
          },
          {
            "subject": "architect",
            "action": "hired",
            "object": "engineer"
          }
        ],
        "middle_entity": "engineer",
        "all_entities": [
          "architect",
          "engineer",
          "carpenter"
        ],
        "questions_by_entity": {
          "architect": [
            {
              "question": "What did the architect do?",
              "answer": "consult the engineer",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "architect",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the architect?",
              "answer": "the engineer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "architect",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "architect",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the architect do?",
              "answer": "hired the carpenter",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "architect",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the architect's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "architect",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the architect's involvement?",
              "answer": "the engineer hired the carpenter",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "architect",
              "is_middle_entity": false
            }
          ],
          "engineer": [
            {
              "question": "What did the engineer do?",
              "answer": "hire the carpenter",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "engineer",
              "is_middle_entity": true
            },
            {
              "question": "Who consulted the engineer?",
              "answer": "the architect",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "engineer",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "engineer",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was consulted do?",
              "answer": "hired the carpenter",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "engineer",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the engineer's action?",
              "answer": "the architect consulting the engineer",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "engineer",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the engineer's involvement?",
              "answer": "the carpenter worked meticulously",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "engineer",
              "is_middle_entity": true
            }
          ],
          "carpenter": [
            {
              "question": "What did the carpenter do?",
              "answer": "worked meticulously",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "carpenter",
              "is_middle_entity": false
            },
            {
              "question": "Who hired the carpenter?",
              "answer": "the engineer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "carpenter",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "carpenter",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was hired do?",
              "answer": "worked meticulously",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "carpenter",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the carpenter's action?",
              "answer": "the architect consulting the engineer which led to the engineer hiring the carpenter",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "carpenter",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the carpenter's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "carpenter",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_12",
        "sentence": "The butterfly that the bird that the cat pounced on startled escaped.",
        "structure": [
          {
            "subject": "butterfly",
            "action": "escaped",
            "object": null
          },
          {
            "subject": "bird",
            "action": "startled",
            "object": "butterfly"
          },
          {
            "subject": "cat",
            "action": "pounced on",
            "object": "bird"
          }
        ],
        "middle_entity": "bird",
        "all_entities": [
          "cat",
          "butterfly",
          "bird"
        ],
        "questions_by_entity": {
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "pounce on the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the cat?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the cat do?",
              "answer": "startled the butterfly",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird startled the butterfly",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "butterfly": [
            {
              "question": "What did the butterfly do?",
              "answer": "escape",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "What startled the butterfly?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "escaped",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the butterfly's action?",
              "answer": "the cat pouncing on the bird which led to the bird startling the butterfly",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the butterfly's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "butterfly",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "startle the butterfly",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What pounced on the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was pounced on do?",
              "answer": "startled the butterfly",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the cat pouncing on the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the butterfly escaped",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_13",
        "sentence": "The squirrel that the raccoon that the coyote startled chased chattered.",
        "structure": [
          {
            "subject": "squirrel",
            "action": "chattered",
            "object": null
          },
          {
            "subject": "raccoon",
            "action": "chased",
            "object": "squirrel"
          },
          {
            "subject": "coyote",
            "action": "startled",
            "object": "raccoon"
          }
        ],
        "middle_entity": "raccoon",
        "all_entities": [
          "raccoon",
          "squirrel",
          "coyote"
        ],
        "questions_by_entity": {
          "raccoon": [
            {
              "question": "What did the raccoon do?",
              "answer": "chase the squirrel",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "raccoon",
              "is_middle_entity": true
            },
            {
              "question": "What startled the raccoon?",
              "answer": "the coyote",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "raccoon",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "raccoon",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "chased the squirrel",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "raccoon",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the raccoon's action?",
              "answer": "the coyote startling the raccoon",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "raccoon",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the raccoon's involvement?",
              "answer": "the squirrel chattered",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "raccoon",
              "is_middle_entity": true
            }
          ],
          "squirrel": [
            {
              "question": "What did the squirrel do?",
              "answer": "chatter",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "What chased the squirrel?",
              "answer": "the raccoon",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "chattered",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the squirrel's action?",
              "answer": "the coyote startling the raccoon which led to the raccoon chasing the squirrel",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the squirrel's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "squirrel",
              "is_middle_entity": false
            }
          ],
          "coyote": [
            {
              "question": "What did the coyote do?",
              "answer": "startle the raccoon",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "coyote",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the coyote?",
              "answer": "the raccoon",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "coyote",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "coyote",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the coyote do?",
              "answer": "chased the squirrel",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "coyote",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the coyote's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "coyote",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the coyote's involvement?",
              "answer": "the raccoon chased the squirrel",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "coyote",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_14",
        "sentence": "The ladybug that the beetle that the bird pecked at followed flew away.",
        "structure": [
          {
            "subject": "ladybug",
            "action": "flew away",
            "object": null
          },
          {
            "subject": "beetle",
            "action": "followed",
            "object": "ladybug"
          },
          {
            "subject": "bird",
            "action": "pecked at",
            "object": "beetle"
          }
        ],
        "middle_entity": "beetle",
        "all_entities": [
          "ladybug",
          "beetle",
          "bird"
        ],
        "questions_by_entity": {
          "ladybug": [
            {
              "question": "What did the ladybug do?",
              "answer": "fly away",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "ladybug",
              "is_middle_entity": false
            },
            {
              "question": "What followed the ladybug?",
              "answer": "the beetle",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "ladybug",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "ladybug",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was followed do?",
              "answer": "flew away",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "ladybug",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the ladybug's action?",
              "answer": "the bird pecking at the beetle which led to the beetle following the ladybug",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "ladybug",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the ladybug's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "ladybug",
              "is_middle_entity": false
            }
          ],
          "beetle": [
            {
              "question": "What did the beetle do?",
              "answer": "follow the ladybug",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "beetle",
              "is_middle_entity": true
            },
            {
              "question": "What pecked at the beetle?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "beetle",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "beetle",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was pecked at do?",
              "answer": "followed the ladybug",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "beetle",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the beetle's action?",
              "answer": "the bird pecking at the beetle",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "beetle",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the beetle's involvement?",
              "answer": "the ladybug flew away",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "beetle",
              "is_middle_entity": true
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "peck at the beetle",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the bird?",
              "answer": "the beetle",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the bird do?",
              "answer": "followed the ladybug",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the beetle followed the ladybug",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_15",
        "sentence": "The scooter that the car that the bus rear-ended bumped toppled.",
        "structure": [
          {
            "subject": "scooter",
            "action": "toppled",
            "object": null
          },
          {
            "subject": "car",
            "action": "bumped",
            "object": "scooter"
          },
          {
            "subject": "bus",
            "action": "rear-ended",
            "object": "car"
          }
        ],
        "middle_entity": "car",
        "all_entities": [
          "bus",
          "scooter",
          "car"
        ],
        "questions_by_entity": {
          "bus": [
            {
              "question": "What did the bus do?",
              "answer": "rear-end the car",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bus",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the bus?",
              "answer": "the car",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bus",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bus",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the bus do?",
              "answer": "bumped the scooter",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bus",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bus's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bus",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bus's involvement?",
              "answer": "the car bumped the scooter",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bus",
              "is_middle_entity": false
            }
          ],
          "scooter": [
            {
              "question": "What did the scooter do?",
              "answer": "topple",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "scooter",
              "is_middle_entity": false
            },
            {
              "question": "What bumped the scooter?",
              "answer": "the car",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "scooter",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "scooter",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was bumped do?",
              "answer": "toppled",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "scooter",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the scooter's action?",
              "answer": "the bus rear-ending the car which led to the car bumping the scooter",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "scooter",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the scooter's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "scooter",
              "is_middle_entity": false
            }
          ],
          "car": [
            {
              "question": "What did the car do?",
              "answer": "bump the scooter",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "car",
              "is_middle_entity": true
            },
            {
              "question": "What rear-ended the car?",
              "answer": "the bus",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "car",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "car",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was rear-ended do?",
              "answer": "bumped the scooter",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "car",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the car's action?",
              "answer": "the bus rear-ending the car",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "car",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the car's involvement?",
              "answer": "the scooter toppled",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "car",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_16",
        "sentence": "The chicken that the fox that the dog barked at chased clucked anxiously.",
        "structure": [
          {
            "subject": "chicken",
            "action": "clucked",
            "object": null
          },
          {
            "subject": "fox",
            "action": "chased",
            "object": "chicken"
          },
          {
            "subject": "dog",
            "action": "barked at",
            "object": "fox"
          }
        ],
        "middle_entity": "fox",
        "all_entities": [
          "chicken",
          "fox",
          "dog"
        ],
        "questions_by_entity": {
          "chicken": [
            {
              "question": "What did the chicken do?",
              "answer": "clucked",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "What chased the chicken?",
              "answer": "the fox",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "clucked",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the chicken's action?",
              "answer": "the dog barked at the fox which led to the fox chasing the chicken",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the chicken's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "chicken",
              "is_middle_entity": false
            }
          ],
          "fox": [
            {
              "question": "What did the fox do?",
              "answer": "chased the chicken",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What barked at the fox?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was barked at do?",
              "answer": "chased the chicken",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the fox's action?",
              "answer": "the dog barked at the fox",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the fox's involvement?",
              "answer": "the chicken clucked",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": true
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "barked at the fox",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the dog?",
              "answer": "the fox",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the dog do?",
              "answer": "chased the chicken",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the fox chased the chicken",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_17",
        "sentence": "The lawyer that the judge that the mayor appointed questioned prepared his case.",
        "structure": [
          {
            "subject": "lawyer",
            "action": "case",
            "object": null
          },
          {
            "subject": "judge",
            "action": "his",
            "object": "lawyer"
          },
          {
            "subject": "mayor",
            "action": "prepared",
            "object": "judge"
          }
        ],
        "middle_entity": "judge",
        "all_entities": [
          "mayor",
          "judge",
          "lawyer"
        ],
        "questions_by_entity": {
          "mayor": [
            {
              "question": "What did the mayor do?",
              "answer": "appoint the judge",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the mayor?",
              "answer": "the judge",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the mayor do?",
              "answer": "questioned the lawyer",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mayor's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mayor's involvement?",
              "answer": "the judge questioned the lawyer",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mayor",
              "is_middle_entity": false
            }
          ],
          "judge": [
            {
              "question": "What did the judge do?",
              "answer": "question the lawyer",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "judge",
              "is_middle_entity": true
            },
            {
              "question": "Who appointed the judge?",
              "answer": "the mayor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "judge",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "judge",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was appointed do?",
              "answer": "questioned the lawyer",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "judge",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the judge's action?",
              "answer": "the mayor appointed the judge",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "judge",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the judge's involvement?",
              "answer": "the lawyer prepared his case",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "judge",
              "is_middle_entity": true
            }
          ],
          "lawyer": [
            {
              "question": "What did the lawyer do?",
              "answer": "prepared his case",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "lawyer",
              "is_middle_entity": false
            },
            {
              "question": "Who questioned the lawyer?",
              "answer": "the judge",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "lawyer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "lawyer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was questioned do?",
              "answer": "prepared his case",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "lawyer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the lawyer's action?",
              "answer": "the mayor appointing the judge which led to the judge questioning the lawyer",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "lawyer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the lawyer's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "lawyer",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_18",
        "sentence": "The goat that the wolf that the bear roared at ran after bleated.",
        "structure": [
          {
            "subject": "goat",
            "action": "bleated",
            "object": null
          },
          {
            "subject": "wolf",
            "action": "ran after",
            "object": "goat"
          },
          {
            "subject": "bear",
            "action": "roared at",
            "object": "wolf"
          }
        ],
        "middle_entity": "wolf",
        "all_entities": [
          "goat",
          "wolf",
          "bear"
        ],
        "questions_by_entity": {
          "goat": [
            {
              "question": "What did the goat do?",
              "answer": "bleat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "goat",
              "is_middle_entity": false
            },
            {
              "question": "What ran after the goat?",
              "answer": "the wolf",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "goat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "goat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was run after do?",
              "answer": "bleated",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "goat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the goat's action?",
              "answer": "the bear roaring at the wolf which led to the wolf running after the goat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "goat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the goat's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "goat",
              "is_middle_entity": false
            }
          ],
          "wolf": [
            {
              "question": "What did the wolf do?",
              "answer": "run after the goat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What roared at the wolf?",
              "answer": "the bear",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was roared at do?",
              "answer": "ran after the goat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the wolf's action?",
              "answer": "the bear roaring at the wolf",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the wolf's involvement?",
              "answer": "the goat bleated",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": true
            }
          ],
          "bear": [
            {
              "question": "What did the bear do?",
              "answer": "roar at the wolf",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the bear?",
              "answer": "the wolf",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the bear do?",
              "answer": "ran after the goat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bear's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bear's involvement?",
              "answer": "the wolf ran after the goat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_19",
        "sentence": "The parrot that the cat that the dog barked at startled squawked.",
        "structure": [
          {
            "subject": "parrot",
            "action": "squawked",
            "object": null
          },
          {
            "subject": "cat",
            "action": "startled",
            "object": "parrot"
          },
          {
            "subject": "dog",
            "action": "barked at",
            "object": "cat"
          }
        ],
        "middle_entity": "cat",
        "all_entities": [
          "cat",
          "parrot",
          "dog"
        ],
        "questions_by_entity": {
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "startle the parrot",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What barked at the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was barked at do?",
              "answer": "startled the parrot",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the dog barking at the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the parrot squawked",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            }
          ],
          "parrot": [
            {
              "question": "What did the parrot do?",
              "answer": "squawk",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "What startled the parrot?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "squawked",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the parrot's action?",
              "answer": "the dog barking at the cat which led to the cat startling the parrot",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the parrot's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "parrot",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "bark at the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the dog?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the dog do?",
              "answer": "startled the parrot",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat startled the parrot",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_20",
        "sentence": "The mouse that the rat that the cat chased startled squeaked.",
        "structure": [
          {
            "subject": "mouse",
            "action": "squeaked",
            "object": null
          },
          {
            "subject": "rat",
            "action": "startled",
            "object": "mouse"
          },
          {
            "subject": "cat",
            "action": "chased",
            "object": "rat"
          }
        ],
        "middle_entity": "rat",
        "all_entities": [
          "cat",
          "mouse",
          "rat"
        ],
        "questions_by_entity": {
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "chase the rat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the cat?",
              "answer": "the rat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the cat do?",
              "answer": "startled the mouse",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the rat startled the mouse",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "mouse": [
            {
              "question": "What did the mouse do?",
              "answer": "squeak",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What startled the mouse?",
              "answer": "the rat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "squeaked",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mouse's action?",
              "answer": "the cat chasing the rat which led to the rat startling the mouse",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mouse's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mouse",
              "is_middle_entity": false
            }
          ],
          "rat": [
            {
              "question": "What did the rat do?",
              "answer": "startle the mouse",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "rat",
              "is_middle_entity": true
            },
            {
              "question": "What chased the rat?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "rat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "rat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "startled the mouse",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "rat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the rat's action?",
              "answer": "the cat chasing the rat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "rat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the rat's involvement?",
              "answer": "the mouse squeaked",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "rat",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_21",
        "sentence": "The mechanic that the engineer that the manager hired praised worked hard.",
        "structure": [
          {
            "subject": "mechanic",
            "action": "worked hard",
            "object": null
          },
          {
            "subject": "engineer",
            "action": "praised",
            "object": "mechanic"
          },
          {
            "subject": "manager",
            "action": "hired",
            "object": "engineer"
          }
        ],
        "middle_entity": "engineer",
        "all_entities": [
          "mechanic",
          "engineer",
          "manager"
        ],
        "questions_by_entity": {
          "mechanic": [
            {
              "question": "What did the mechanic do?",
              "answer": "worked hard",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mechanic",
              "is_middle_entity": false
            },
            {
              "question": "Who praised the mechanic?",
              "answer": "the engineer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mechanic",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mechanic",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was praised do?",
              "answer": "worked hard",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mechanic",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mechanic's action?",
              "answer": "the manager hired the engineer which led to the engineer praising the mechanic",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mechanic",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mechanic's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mechanic",
              "is_middle_entity": false
            }
          ],
          "engineer": [
            {
              "question": "What did the engineer do?",
              "answer": "praised the mechanic",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "engineer",
              "is_middle_entity": true
            },
            {
              "question": "Who hired the engineer?",
              "answer": "the manager",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "engineer",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "engineer",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was hired do?",
              "answer": "praised the mechanic",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "engineer",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the engineer's action?",
              "answer": "the manager hired the engineer",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "engineer",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the engineer's involvement?",
              "answer": "the mechanic worked hard",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "engineer",
              "is_middle_entity": true
            }
          ],
          "manager": [
            {
              "question": "What did the manager do?",
              "answer": "hired the engineer",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "manager",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the manager?",
              "answer": "the engineer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "manager",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "manager",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the manager do?",
              "answer": "praised the mechanic",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "manager",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the manager's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "manager",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the manager's involvement?",
              "answer": "the engineer praised the mechanic",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "manager",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_22",
        "sentence": "The scientist that the professor that the dean praised lectured researched diligently.",
        "structure": [
          {
            "subject": "scientist",
            "action": "diligently",
            "object": null
          },
          {
            "subject": "professor",
            "action": "researched",
            "object": "scientist"
          },
          {
            "subject": "dean",
            "action": "lectured",
            "object": "professor"
          }
        ],
        "middle_entity": "professor",
        "all_entities": [
          "dean",
          "scientist",
          "professor"
        ],
        "questions_by_entity": {
          "dean": [
            {
              "question": "What did the dean do?",
              "answer": "praise the professor",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dean",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the dean?",
              "answer": "the professor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dean",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dean",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the dean do?",
              "answer": "lectured the scientist",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dean",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dean's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dean",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dean's involvement?",
              "answer": "the professor lectured the scientist",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dean",
              "is_middle_entity": false
            }
          ],
          "scientist": [
            {
              "question": "What did the scientist do?",
              "answer": "researched diligently",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "scientist",
              "is_middle_entity": false
            },
            {
              "question": "Who lectured the scientist?",
              "answer": "the professor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "scientist",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "scientist",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was lectured do?",
              "answer": "researched diligently",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "scientist",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the scientist's action?",
              "answer": "the dean praising the professor which led to the professor lecturing the scientist",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "scientist",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the scientist's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "scientist",
              "is_middle_entity": false
            }
          ],
          "professor": [
            {
              "question": "What did the professor do?",
              "answer": "lecture the scientist",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "professor",
              "is_middle_entity": true
            },
            {
              "question": "Who praised the professor?",
              "answer": "the dean",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "professor",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "professor",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was praised do?",
              "answer": "lectured the scientist",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "professor",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the professor's action?",
              "answer": "the dean praising the professor",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "professor",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the professor's involvement?",
              "answer": "the scientist researched diligently",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "professor",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_23",
        "sentence": "The spider that the bird that the snake spooked flew at retreated.",
        "structure": [
          {
            "subject": "spider",
            "action": "retreated",
            "object": null
          },
          {
            "subject": "bird",
            "action": "flew at",
            "object": "spider"
          },
          {
            "subject": "snake",
            "action": "spooked",
            "object": "bird"
          }
        ],
        "middle_entity": "bird",
        "all_entities": [
          "snake",
          "spider",
          "bird"
        ],
        "questions_by_entity": {
          "snake": [
            {
              "question": "What did the snake do?",
              "answer": "spook the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the snake?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the snake do?",
              "answer": "flew at the spider",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the snake's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the snake's involvement?",
              "answer": "the bird flew at the spider",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            }
          ],
          "spider": [
            {
              "question": "What did the spider do?",
              "answer": "retreat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What flew at the spider?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was flown at do?",
              "answer": "retreated",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the spider's action?",
              "answer": "the snake spooking the bird which led to the bird flying at the spider",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the spider's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "fly at the spider",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What spooked the bird?",
              "answer": "the snake",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was spooked do?",
              "answer": "flew at the spider",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the snake spooking the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the spider retreated",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_24",
        "sentence": "The goldfish that the cat that the dog startled chased swam away.",
        "structure": [
          {
            "subject": "goldfish",
            "action": "swam away",
            "object": null
          },
          {
            "subject": "cat",
            "action": "chased",
            "object": "goldfish"
          },
          {
            "subject": "dog",
            "action": "startled",
            "object": "cat"
          }
        ],
        "middle_entity": "cat",
        "all_entities": [
          "cat",
          "goldfish",
          "dog"
        ],
        "questions_by_entity": {
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "chase the goldfish",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What startled the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "chased the goldfish",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the dog startling the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the goldfish swam away",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            }
          ],
          "goldfish": [
            {
              "question": "What did the goldfish do?",
              "answer": "swim away",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "What chased the goldfish?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "swam away",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the goldfish's action?",
              "answer": "the dog startling the cat which led to the cat chasing the goldfish",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the goldfish's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "goldfish",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "startle the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the dog?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the dog do?",
              "answer": "chased the goldfish",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat chased the goldfish",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_25",
        "sentence": "The sheep that the wolf that the bear scared ran after bleated.",
        "structure": [
          {
            "subject": "sheep",
            "action": "bleated",
            "object": null
          },
          {
            "subject": "wolf",
            "action": "after",
            "object": "sheep"
          },
          {
            "subject": "bear",
            "action": "ran",
            "object": "wolf"
          }
        ],
        "middle_entity": "wolf",
        "all_entities": [
          "wolf",
          "sheep",
          "bear"
        ],
        "questions_by_entity": {
          "wolf": [
            {
              "question": "What did the wolf do?",
              "answer": "run after the sheep",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What scared the wolf?",
              "answer": "the bear",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "ran after the sheep",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the wolf's action?",
              "answer": "the bear scaring the wolf",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the wolf's involvement?",
              "answer": "the sheep bleated",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": true
            }
          ],
          "sheep": [
            {
              "question": "What did the sheep do?",
              "answer": "bleat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "sheep",
              "is_middle_entity": false
            },
            {
              "question": "What ran after the sheep?",
              "answer": "the wolf",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "sheep",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "sheep",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was run after do?",
              "answer": "bleated",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "sheep",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the sheep's action?",
              "answer": "the bear scaring the wolf which led to the wolf running after the sheep",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "sheep",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the sheep's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "sheep",
              "is_middle_entity": false
            }
          ],
          "bear": [
            {
              "question": "What did the bear do?",
              "answer": "scared the wolf",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the bear?",
              "answer": "the wolf",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the bear do?",
              "answer": "ran after the sheep",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bear's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bear's involvement?",
              "answer": "the wolf ran after the sheep",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_26",
        "sentence": "The jeep that the truck that the train hit pushed rolled over.",
        "structure": [
          {
            "subject": "jeep",
            "action": "rolled over",
            "object": null
          },
          {
            "subject": "truck",
            "action": "pushed",
            "object": "jeep"
          },
          {
            "subject": "train",
            "action": "hit",
            "object": "truck"
          }
        ],
        "middle_entity": "truck",
        "all_entities": [
          "train",
          "jeep",
          "truck"
        ],
        "questions_by_entity": {
          "train": [
            {
              "question": "What did the train do?",
              "answer": "hit the truck",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "train",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the train?",
              "answer": "the truck",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "train",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "train",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the train do?",
              "answer": "pushed the jeep",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "train",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the train's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "train",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the train's involvement?",
              "answer": "the truck pushed the jeep",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "train",
              "is_middle_entity": false
            }
          ],
          "jeep": [
            {
              "question": "What did the jeep do?",
              "answer": "rol over",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "jeep",
              "is_middle_entity": false
            },
            {
              "question": "What pushed the jeep?",
              "answer": "the truck",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "jeep",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "jeep",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was pushed do?",
              "answer": "rolled over",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "jeep",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the jeep's action?",
              "answer": "the train hitting the truck which led to the truck pushing the jeep",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "jeep",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the jeep's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "jeep",
              "is_middle_entity": false
            }
          ],
          "truck": [
            {
              "question": "What did the truck do?",
              "answer": "push the jeep",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "truck",
              "is_middle_entity": true
            },
            {
              "question": "What hit the truck?",
              "answer": "the train",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "truck",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "truck",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was hit do?",
              "answer": "pushed the jeep",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "truck",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the truck's action?",
              "answer": "the train hitting the truck",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "truck",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the truck's involvement?",
              "answer": "the jeep rolled over",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "truck",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_27",
        "sentence": "The grasshopper that the frog that the snake spotted chased chirped.",
        "structure": [
          {
            "subject": "grasshopper",
            "action": "chirped",
            "object": null
          },
          {
            "subject": "frog",
            "action": "chased",
            "object": "grasshopper"
          },
          {
            "subject": "snake",
            "action": "spotted",
            "object": "frog"
          }
        ],
        "middle_entity": "frog",
        "all_entities": [
          "frog",
          "grasshopper",
          "snake"
        ],
        "questions_by_entity": {
          "frog": [
            {
              "question": "What did the frog do?",
              "answer": "chase the grasshopper",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "frog",
              "is_middle_entity": true
            },
            {
              "question": "What spotted the frog?",
              "answer": "the snake",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "frog",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "frog",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was spotted do?",
              "answer": "chased the grasshopper",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "frog",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the frog's action?",
              "answer": "the snake spotting the frog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "frog",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the frog's involvement?",
              "answer": "the grasshopper chirped",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "frog",
              "is_middle_entity": true
            }
          ],
          "grasshopper": [
            {
              "question": "What did the grasshopper do?",
              "answer": "chirp",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "grasshopper",
              "is_middle_entity": false
            },
            {
              "question": "What chased the grasshopper?",
              "answer": "the frog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "grasshopper",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "grasshopper",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "chirped",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "grasshopper",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the grasshopper's action?",
              "answer": "the snake spotting the frog which led to the frog chasing the grasshopper",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "grasshopper",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the grasshopper's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "grasshopper",
              "is_middle_entity": false
            }
          ],
          "snake": [
            {
              "question": "What did the snake do?",
              "answer": "spot the frog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the snake?",
              "answer": "the frog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the snake do?",
              "answer": "chased the grasshopper",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the snake's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the snake's involvement?",
              "answer": "the frog chased the grasshopper",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_28",
        "sentence": "The cyclist that the driver that the police officer stopped pushed rode away.",
        "structure": [
          {
            "subject": "cyclist",
            "action": "rode away",
            "object": null
          },
          {
            "subject": "driver",
            "action": "pushed",
            "object": "cyclist"
          },
          {
            "subject": "police officer",
            "action": "stopped",
            "object": "driver"
          }
        ],
        "middle_entity": "driver",
        "all_entities": [
          "driver",
          "cyclist",
          "police officer"
        ],
        "questions_by_entity": {
          "driver": [
            {
              "question": "What did the driver do?",
              "answer": "push the cyclist",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "driver",
              "is_middle_entity": true
            },
            {
              "question": "Who stopped the driver?",
              "answer": "the police officer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "driver",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "driver",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was stopped do?",
              "answer": "pushed the cyclist",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "driver",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the driver's action?",
              "answer": "the police officer stopping the driver",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "driver",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the driver's involvement?",
              "answer": "the cyclist rode away",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "driver",
              "is_middle_entity": true
            }
          ],
          "cyclist": [
            {
              "question": "What did the cyclist do?",
              "answer": "ride away",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cyclist",
              "is_middle_entity": false
            },
            {
              "question": "Who pushed the cyclist?",
              "answer": "the driver",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cyclist",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cyclist",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was pushed do?",
              "answer": "rode away",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cyclist",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cyclist's action?",
              "answer": "the police officer stopping the driver which led to the driver pushing the cyclist",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cyclist",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cyclist's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cyclist",
              "is_middle_entity": false
            }
          ],
          "police officer": [
            {
              "question": "What did the police officer do?",
              "answer": "stop the driver",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "police officer",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the police officer?",
              "answer": "the driver",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "police officer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "police officer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the police officer do?",
              "answer": "pushed the cyclist",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "police officer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the police officer's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "police officer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the police officer's involvement?",
              "answer": "the driver pushed the cyclist",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "police officer",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_29",
        "sentence": "The starfish that the crab that the seagull chased crawled over slipped away.",
        "structure": [
          {
            "subject": "starfish",
            "action": "slipped away",
            "object": null
          },
          {
            "subject": "crab",
            "action": "crawled over",
            "object": "starfish"
          },
          {
            "subject": "seagull",
            "action": "chased",
            "object": "crab"
          }
        ],
        "middle_entity": "crab",
        "all_entities": [
          "crab",
          "starfish",
          "seagull"
        ],
        "questions_by_entity": {
          "crab": [
            {
              "question": "What did the crab do?",
              "answer": "crawl over the starfish",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "crab",
              "is_middle_entity": true
            },
            {
              "question": "What chased the crab?",
              "answer": "the seagull",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "crab",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "crab",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "crawled over the starfish",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "crab",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the crab's action?",
              "answer": "the seagull chasing the crab",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "crab",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the crab's involvement?",
              "answer": "the starfish slipped away",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "crab",
              "is_middle_entity": true
            }
          ],
          "starfish": [
            {
              "question": "What did the starfish do?",
              "answer": "slip away",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "What crawled over the starfish?",
              "answer": "the crab",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was crawled over do?",
              "answer": "slipped away",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the starfish's action?",
              "answer": "the seagull chasing the crab which led to the crab crawling over the starfish",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the starfish's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "starfish",
              "is_middle_entity": false
            }
          ],
          "seagull": [
            {
              "question": "What did the seagull do?",
              "answer": "chase the crab",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "seagull",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the seagull?",
              "answer": "the crab",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "seagull",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "seagull",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the seagull do?",
              "answer": "crawled over the starfish",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "seagull",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the seagull's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "seagull",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the seagull's involvement?",
              "answer": "the crab crawled over the starfish",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "seagull",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 18
      },
      {
        "id": "complexity_2_sentence_30",
        "sentence": "The pig that the dog that the farmer commanded herded squealed.",
        "structure": [
          {
            "subject": "pig",
            "action": "squealed",
            "object": null
          },
          {
            "subject": "dog",
            "action": "herded",
            "object": "pig"
          },
          {
            "subject": "farmer",
            "action": "commanded",
            "object": "dog"
          }
        ],
        "middle_entity": "dog",
        "all_entities": [
          "pig",
          "dog",
          "farmer"
        ],
        "questions_by_entity": {
          "pig": [
            {
              "question": "What did the pig do?",
              "answer": "squeal",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "pig",
              "is_middle_entity": false
            },
            {
              "question": "What herded the pig?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "pig",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "pig",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was herded do?",
              "answer": "squealed",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "pig",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the pig's action?",
              "answer": "the farmer commanding the dog which led to the dog herding the pig",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "pig",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the pig's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "pig",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "herd the pig",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "Who commanded the dog?",
              "answer": "the farmer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was commanded do?",
              "answer": "herded the pig",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the farmer commanding the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the pig squealed",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            }
          ],
          "farmer": [
            {
              "question": "What did the farmer do?",
              "answer": "command the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the farmer?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "3",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the farmer do?",
              "answer": "herded the pig",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the farmer's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the farmer's involvement?",
              "answer": "the dog herded the pig",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "farmer",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 18
      }
    ],
    "total_questions": 528,
    "entities_processed": 88,
    "middle_entities_flagged": 30
  },
  "complexity_3": {
    "sentences": [
      {
        "id": "complexity_3_sentence_1",
        "sentence": "The cat that the dog that the wolf that the bear stalked scared chased ran away.",
        "structure": [
          {
            "subject": "cat",
            "action": "ran away",
            "object": null
          },
          {
            "subject": "dog",
            "action": "chased",
            "object": "cat"
          },
          {
            "subject": "wolf",
            "action": "scared",
            "object": "dog"
          },
          {
            "subject": "bear",
            "action": "stalked",
            "object": "wolf"
          }
        ],
        "middle_entity": "dog",
        "all_entities": [
          "cat",
          "wolf",
          "dog",
          "bear"
        ],
        "questions_by_entity": {
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "run away",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What chased the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "ran away",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the bear stalking the wolf which led to the wolf scaring the dog which led to the dog chasing the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "wolf": [
            {
              "question": "What did the wolf do?",
              "answer": "scare the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What stalked the wolf?",
              "answer": "the bear",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was stalked do?",
              "answer": "scared the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the wolf's action?",
              "answer": "the bear stalking the wolf",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the wolf's involvement?",
              "answer": "the dog chased the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "chase the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What scared the dog?",
              "answer": "the wolf",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the bear stalking the wolf which led to the wolf scaring the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat ran away",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            }
          ],
          "bear": [
            {
              "question": "What did the bear do?",
              "answer": "stalk the wolf",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the bear?",
              "answer": "the wolf",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the bear do?",
              "answer": "scared the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bear's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bear's involvement?",
              "answer": "the wolf scared the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_2",
        "sentence": "The mouse that the cat that the dog that the farmer owned chased caught squeaked.",
        "structure": [
          {
            "subject": "mouse",
            "action": "squeaked",
            "object": null
          },
          {
            "subject": "cat",
            "action": "caught",
            "object": "mouse"
          },
          {
            "subject": "dog",
            "action": "chased",
            "object": "cat"
          },
          {
            "subject": "farmer",
            "action": "owned",
            "object": "dog"
          }
        ],
        "middle_entity": "cat",
        "all_entities": [
          "cat",
          "mouse",
          "dog",
          "farmer"
        ],
        "questions_by_entity": {
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "catch the mouse",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What chased the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "caught the mouse",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the farmer owning the dog which led to the dog chasing the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the mouse squeaked",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            }
          ],
          "mouse": [
            {
              "question": "What did the mouse do?",
              "answer": "squeak",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What caught the mouse?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "squeaked",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mouse's action?",
              "answer": "the farmer owning the dog which led to the dog chasing the cat which led to the cat catching the mouse",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mouse's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mouse",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "chase the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "Who owned the dog?",
              "answer": "the farmer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was owned do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the farmer owning the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat caught the mouse",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ],
          "farmer": [
            {
              "question": "What did the farmer do?",
              "answer": "own the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the farmer?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the farmer do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the farmer's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the farmer's involvement?",
              "answer": "the dog chased the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "farmer",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_3",
        "sentence": "The fly that the spider that the bird that the snake hissed at saw caught died.",
        "structure": [
          {
            "subject": "fly",
            "action": "died",
            "object": null
          },
          {
            "subject": "spider",
            "action": "caught",
            "object": "fly"
          },
          {
            "subject": "bird",
            "action": "saw",
            "object": "spider"
          },
          {
            "subject": "snake",
            "action": "hissed at",
            "object": "bird"
          }
        ],
        "middle_entity": "spider",
        "all_entities": [
          "bird",
          "snake",
          "spider",
          "fly"
        ],
        "questions_by_entity": {
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "see the spider",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What hissed at the bird?",
              "answer": "the snake",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was hissed at do?",
              "answer": "saw the spider",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the snake hissing at the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the spider caught the fly",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "snake": [
            {
              "question": "What did the snake do?",
              "answer": "hiss at the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the snake?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the snake do?",
              "answer": "saw the spider",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the snake's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the snake's involvement?",
              "answer": "the bird saw the spider",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            }
          ],
          "spider": [
            {
              "question": "What did the spider do?",
              "answer": "catch the fly",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": true
            },
            {
              "question": "What saw the spider?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "caught the fly",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the spider's action?",
              "answer": "the snake hissing at the bird which led to the bird seeing the spider",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the spider's involvement?",
              "answer": "the fly died",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": true
            }
          ],
          "fly": [
            {
              "question": "What did the fly do?",
              "answer": "die",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What caught the fly?",
              "answer": "the spider",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "died",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the fly's action?",
              "answer": "the snake hissing at the bird which led to the bird seeing the spider which led to the spider catching the fly",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the fly's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fly",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_4",
        "sentence": "The paper that the writer that the editor that the publisher hired supervised edited was published.",
        "structure": [
          {
            "subject": "paper",
            "action": "published",
            "object": null
          },
          {
            "subject": "writer",
            "action": "was",
            "object": "paper"
          },
          {
            "subject": "editor",
            "action": "edited",
            "object": "writer"
          },
          {
            "subject": "publisher",
            "action": "supervised",
            "object": "editor"
          }
        ],
        "middle_entity": "writer",
        "all_entities": [
          "publisher",
          "writer",
          "editor",
          "paper"
        ],
        "questions_by_entity": {
          "publisher": [
            {
              "question": "What did the publisher do?",
              "answer": "hired the editor",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "publisher",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the publisher?",
              "answer": "the editor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "publisher",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "publisher",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the publisher do?",
              "answer": "supervised the writer",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "publisher",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the publisher's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "publisher",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the publisher's involvement?",
              "answer": "the editor supervised the writer",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "publisher",
              "is_middle_entity": false
            }
          ],
          "writer": [
            {
              "question": "What did the writer do?",
              "answer": "edited the paper",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "writer",
              "is_middle_entity": true
            },
            {
              "question": "Who supervised the writer?",
              "answer": "the editor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "writer",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "writer",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was supervised do?",
              "answer": "edited the paper",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "writer",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the writer's action?",
              "answer": "the publisher hiring the editor which led to the editor supervising the writer",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "writer",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the writer's involvement?",
              "answer": "the paper was published",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "writer",
              "is_middle_entity": true
            }
          ],
          "editor": [
            {
              "question": "What did the editor do?",
              "answer": "supervised the writer",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "editor",
              "is_middle_entity": false
            },
            {
              "question": "Who hired the editor?",
              "answer": "the publisher",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "editor",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "editor",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was hired do?",
              "answer": "supervised the writer",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "editor",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the editor's action?",
              "answer": "the publisher hired the editor",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "editor",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the editor's involvement?",
              "answer": "the writer edited the paper",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "editor",
              "is_middle_entity": false
            }
          ],
          "paper": [
            {
              "question": "What happened to the paper?",
              "answer": "was published",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "paper",
              "is_middle_entity": false
            },
            {
              "question": "Who edited the paper?",
              "answer": "the writer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "paper",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "paper",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was edited do?",
              "answer": "was published",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "paper",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the paper's action?",
              "answer": "the publisher hiring the editor which led to the editor supervising the writer which led to the writer editing the paper",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "paper",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the paper's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "paper",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_5",
        "sentence": "The fish that the eagle that the wolf that the bear frightened stalked chased swam away.",
        "structure": [
          {
            "subject": "fish",
            "action": "swam away",
            "object": null
          },
          {
            "subject": "eagle",
            "action": "chased",
            "object": "fish"
          },
          {
            "subject": "wolf",
            "action": "stalked",
            "object": "eagle"
          },
          {
            "subject": "bear",
            "action": "frightened",
            "object": "wolf"
          }
        ],
        "middle_entity": "eagle",
        "all_entities": [
          "wolf",
          "eagle",
          "fish",
          "bear"
        ],
        "questions_by_entity": {
          "wolf": [
            {
              "question": "What did the wolf do?",
              "answer": "stalk the eagle",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What frightened the wolf?",
              "answer": "the bear",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was frightened do?",
              "answer": "stalked the eagle",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the wolf's action?",
              "answer": "the bear frightening the wolf",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the wolf's involvement?",
              "answer": "the eagle chased the fish",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": false
            }
          ],
          "eagle": [
            {
              "question": "What did the eagle do?",
              "answer": "chase the fish",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "eagle",
              "is_middle_entity": true
            },
            {
              "question": "What stalked the eagle?",
              "answer": "the wolf",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "eagle",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "eagle",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was stalked do?",
              "answer": "chased the fish",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "eagle",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the eagle's action?",
              "answer": "the bear frightening the wolf which led to the wolf stalking the eagle",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "eagle",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the eagle's involvement?",
              "answer": "the fish swam away",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "eagle",
              "is_middle_entity": true
            }
          ],
          "fish": [
            {
              "question": "What did the fish do?",
              "answer": "swim away",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fish",
              "is_middle_entity": false
            },
            {
              "question": "What chased the fish?",
              "answer": "the eagle",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fish",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fish",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "swam away",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fish",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the fish's action?",
              "answer": "the bear frightening the wolf which led to the wolf stalking the eagle which led to the eagle chasing the fish",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fish",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the fish's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fish",
              "is_middle_entity": false
            }
          ],
          "bear": [
            {
              "question": "What did the bear do?",
              "answer": "frighten the wolf",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the bear?",
              "answer": "the wolf",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the bear do?",
              "answer": "stalked the eagle",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bear's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bear's involvement?",
              "answer": "the wolf stalked the eagle",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_6",
        "sentence": "The letter that the mailman that the dog that the child adopted bit delivered fell.",
        "structure": [
          {
            "subject": "letter",
            "action": "fell",
            "object": null
          },
          {
            "subject": "mailman",
            "action": "delivered",
            "object": "letter"
          },
          {
            "subject": "dog",
            "action": "bit",
            "object": "mailman"
          },
          {
            "subject": "child",
            "action": "adopted",
            "object": "dog"
          }
        ],
        "middle_entity": "mailman",
        "all_entities": [
          "child",
          "mailman",
          "dog",
          "letter"
        ],
        "questions_by_entity": {
          "child": [
            {
              "question": "What did the child do?",
              "answer": "adopt the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the child?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the child do?",
              "answer": "bit the mailman",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the child's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the child's involvement?",
              "answer": "the dog bit the mailman",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": false
            }
          ],
          "mailman": [
            {
              "question": "What did the mailman do?",
              "answer": "deliver the letter",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mailman",
              "is_middle_entity": true
            },
            {
              "question": "What bit the mailman?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mailman",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mailman",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was bitten do?",
              "answer": "delivered the letter",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mailman",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the mailman's action?",
              "answer": "the child adopting the dog which led to the dog biting the mailman",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mailman",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the mailman's involvement?",
              "answer": "the letter fell",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mailman",
              "is_middle_entity": true
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "bite the mailman",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "Who adopted the dog?",
              "answer": "the child",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was adopted do?",
              "answer": "bit the mailman",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the child adopting the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the mailman delivered the letter",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ],
          "letter": [
            {
              "question": "What did the letter do?",
              "answer": "fall",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "letter",
              "is_middle_entity": false
            },
            {
              "question": "Who delivered the letter?",
              "answer": "the mailman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "letter",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "letter",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was delivered do?",
              "answer": "fell",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "letter",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the letter's action?",
              "answer": "the child adopting the dog which led to the dog biting the mailman which led to the mailman delivering the letter",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "letter",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the letter's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "letter",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_7",
        "sentence": "The rabbit that the fox that the bear that the hunter tailed pursued pounced on escaped.",
        "structure": [
          {
            "subject": "rabbit",
            "action": "escaped",
            "object": null
          },
          {
            "subject": "fox",
            "action": "pounced on",
            "object": "rabbit"
          },
          {
            "subject": "bear",
            "action": "pursued",
            "object": "fox"
          },
          {
            "subject": "hunter",
            "action": "tailed",
            "object": "bear"
          }
        ],
        "middle_entity": "fox",
        "all_entities": [
          "hunter",
          "fox",
          "rabbit",
          "bear"
        ],
        "questions_by_entity": {
          "hunter": [
            {
              "question": "What did the hunter do?",
              "answer": "tail the bear",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the hunter?",
              "answer": "the bear",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the hunter do?",
              "answer": "pursued the fox",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the hunter's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the hunter's involvement?",
              "answer": "the bear pursued the fox",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            }
          ],
          "fox": [
            {
              "question": "What did the fox do?",
              "answer": "pounce on the rabbit",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What pursued the fox?",
              "answer": "the bear",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was pursued do?",
              "answer": "pounced on the rabbit",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the fox's action?",
              "answer": "the hunter tailing the bear which led to the bear pursuing the fox",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the fox's involvement?",
              "answer": "the rabbit escaped",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": true
            }
          ],
          "rabbit": [
            {
              "question": "What did the rabbit do?",
              "answer": "escape",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What pounced on the rabbit?",
              "answer": "the fox",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was pounced on do?",
              "answer": "escaped",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the rabbit's action?",
              "answer": "the hunter tailing the bear which led to the bear pursuing the fox which led to the fox pouncing on the rabbit",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the rabbit's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "rabbit",
              "is_middle_entity": false
            }
          ],
          "bear": [
            {
              "question": "What did the bear do?",
              "answer": "pursue the fox",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "Who tailed the bear?",
              "answer": "the hunter",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was tailed do?",
              "answer": "pursued the fox",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bear's action?",
              "answer": "the hunter tailing the bear",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bear's involvement?",
              "answer": "the fox pounced on the rabbit",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_8",
        "sentence": "The thief that the police officer that the detective that the chief appointed consulted arrested confessed.",
        "structure": [
          {
            "subject": "thief",
            "action": "confessed",
            "object": null
          },
          {
            "subject": "police officer",
            "action": "arrested",
            "object": "thief"
          },
          {
            "subject": "detective",
            "action": "consulted",
            "object": "police officer"
          },
          {
            "subject": "chief",
            "action": "appointed",
            "object": "detective"
          }
        ],
        "middle_entity": "police officer",
        "all_entities": [
          "detective",
          "thief",
          "chief",
          "police officer"
        ],
        "questions_by_entity": {
          "detective": [
            {
              "question": "What did the detective do?",
              "answer": "consult the police officer",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "detective",
              "is_middle_entity": false
            },
            {
              "question": "Who appointed the detective?",
              "answer": "the chief",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "detective",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "detective",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was appointed do?",
              "answer": "consulted the police officer",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "detective",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the detective's action?",
              "answer": "the chief appointing the detective",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "detective",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the detective's involvement?",
              "answer": "the police officer arrested the thief",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "detective",
              "is_middle_entity": false
            }
          ],
          "thief": [
            {
              "question": "What did the thief do?",
              "answer": "confess",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "thief",
              "is_middle_entity": false
            },
            {
              "question": "Who arrested the thief?",
              "answer": "the police officer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "thief",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "thief",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was arrested do?",
              "answer": "confessed",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "thief",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the thief's action?",
              "answer": "the chief appointing the detective which led to the detective consulting the police officer which led to the police officer arresting the thief",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "thief",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the thief's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "thief",
              "is_middle_entity": false
            }
          ],
          "chief": [
            {
              "question": "What did the chief do?",
              "answer": "appoint the detective",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "chief",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the chief?",
              "answer": "the detective",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "chief",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "chief",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the chief do?",
              "answer": "consulted the police officer",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "chief",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the chief's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "chief",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the chief's involvement?",
              "answer": "the detective consulted the police officer",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "chief",
              "is_middle_entity": false
            }
          ],
          "police officer": [
            {
              "question": "What did the police officer do?",
              "answer": "arrest the thief",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "police officer",
              "is_middle_entity": true
            },
            {
              "question": "Who consulted the police officer?",
              "answer": "the detective",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "police officer",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "police officer",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was consulted do?",
              "answer": "arrested the thief",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "police officer",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the police officer's action?",
              "answer": "the chief appointing the detective which led to the detective consulting the police officer",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "police officer",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the police officer's involvement?",
              "answer": "the thief confessed",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "police officer",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_9",
        "sentence": "The snake that the mongoose that the lion that the hunter tracked chased ate died.",
        "structure": [
          {
            "subject": "snake",
            "action": "died",
            "object": null
          },
          {
            "subject": "mongoose",
            "action": "ate",
            "object": "snake"
          },
          {
            "subject": "lion",
            "action": "chased",
            "object": "mongoose"
          },
          {
            "subject": "hunter",
            "action": "tracked",
            "object": "lion"
          }
        ],
        "middle_entity": "mongoose",
        "all_entities": [
          "hunter",
          "snake",
          "lion",
          "mongoose"
        ],
        "questions_by_entity": {
          "hunter": [
            {
              "question": "What did the hunter do?",
              "answer": "track the lion",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the hunter?",
              "answer": "the lion",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the hunter do?",
              "answer": "chased the mongoose",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the hunter's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the hunter's involvement?",
              "answer": "the lion chased the mongoose",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            }
          ],
          "snake": [
            {
              "question": "What did the snake do?",
              "answer": "die",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What ate the snake?",
              "answer": "the mongoose",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was eaten do?",
              "answer": "died",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the snake's action?",
              "answer": "the hunter tracking the lion which led to the lion chasing the mongoose which led to the mongoose eating the snake",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the snake's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            }
          ],
          "lion": [
            {
              "question": "What did the lion do?",
              "answer": "chase the mongoose",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "lion",
              "is_middle_entity": false
            },
            {
              "question": "Who tracked the lion?",
              "answer": "the hunter",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "lion",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "lion",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was tracked do?",
              "answer": "chased the mongoose",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "lion",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the lion's action?",
              "answer": "the hunter tracking the lion",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "lion",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the lion's involvement?",
              "answer": "the mongoose ate the snake",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "lion",
              "is_middle_entity": false
            }
          ],
          "mongoose": [
            {
              "question": "What did the mongoose do?",
              "answer": "eat the snake",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mongoose",
              "is_middle_entity": true
            },
            {
              "question": "What chased the mongoose?",
              "answer": "the lion",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mongoose",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mongoose",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "ate the snake",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mongoose",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the mongoose's action?",
              "answer": "the hunter tracking the lion which led to the lion chasing the mongoose",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mongoose",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the mongoose's involvement?",
              "answer": "the snake died",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mongoose",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_10",
        "sentence": "The sheep that the dog that the farmer that the doctor treated owned herded bleated.",
        "structure": [
          {
            "subject": "sheep",
            "action": "bleated",
            "object": null
          },
          {
            "subject": "dog",
            "action": "herded",
            "object": "sheep"
          },
          {
            "subject": "farmer",
            "action": "owned",
            "object": "dog"
          },
          {
            "subject": "doctor",
            "action": "treated",
            "object": "farmer"
          }
        ],
        "middle_entity": "dog",
        "all_entities": [
          "doctor",
          "sheep",
          "dog",
          "farmer"
        ],
        "questions_by_entity": {
          "doctor": [
            {
              "question": "What did the doctor do?",
              "answer": "treat the farmer",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "doctor",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the doctor?",
              "answer": "the farmer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "doctor",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "doctor",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the doctor do?",
              "answer": "owned the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "doctor",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the doctor's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "doctor",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the doctor's involvement?",
              "answer": "the farmer owned the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "doctor",
              "is_middle_entity": false
            }
          ],
          "sheep": [
            {
              "question": "What did the sheep do?",
              "answer": "bleat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "sheep",
              "is_middle_entity": false
            },
            {
              "question": "What herded the sheep?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "sheep",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "sheep",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was herded do?",
              "answer": "bleated",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "sheep",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the sheep's action?",
              "answer": "the doctor treating the farmer which led to the farmer owning the dog which led to the dog herding the sheep",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "sheep",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the sheep's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "sheep",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "herd the sheep",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "Who owned the dog?",
              "answer": "the farmer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was owned do?",
              "answer": "herded the sheep",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the doctor treating the farmer which led to the farmer owning the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the sheep bleated",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            }
          ],
          "farmer": [
            {
              "question": "What did the farmer do?",
              "answer": "own the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "Who treated the farmer?",
              "answer": "the doctor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was treated do?",
              "answer": "owned the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the farmer's action?",
              "answer": "the doctor treating the farmer",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the farmer's involvement?",
              "answer": "the dog herded the sheep",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "farmer",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_11",
        "sentence": "The tuna that the shark that the whale that the submarine observed tailed hunted got away.",
        "structure": [
          {
            "subject": "tuna",
            "action": "got away",
            "object": null
          },
          {
            "subject": "shark",
            "action": "hunted",
            "object": "tuna"
          },
          {
            "subject": "whale",
            "action": "tailed",
            "object": "shark"
          },
          {
            "subject": "submarine",
            "action": "observed",
            "object": "whale"
          }
        ],
        "middle_entity": "shark",
        "all_entities": [
          "whale",
          "shark",
          "tuna",
          "submarine"
        ],
        "questions_by_entity": {
          "whale": [
            {
              "question": "What did the whale do?",
              "answer": "tail the shark",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "whale",
              "is_middle_entity": false
            },
            {
              "question": "What observed the whale?",
              "answer": "the submarine",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "whale",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "whale",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was observed do?",
              "answer": "tailed the shark",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "whale",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the whale's action?",
              "answer": "the submarine observing the whale",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "whale",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the whale's involvement?",
              "answer": "the shark hunted the tuna",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "whale",
              "is_middle_entity": false
            }
          ],
          "shark": [
            {
              "question": "What did the shark do?",
              "answer": "hunt the tuna",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "shark",
              "is_middle_entity": true
            },
            {
              "question": "What tailed the shark?",
              "answer": "the whale",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "shark",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "shark",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was tailed do?",
              "answer": "hunted the tuna",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "shark",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the shark's action?",
              "answer": "the submarine observing the whale which led to the whale tailing the shark",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "shark",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the shark's involvement?",
              "answer": "the tuna got away",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "shark",
              "is_middle_entity": true
            }
          ],
          "tuna": [
            {
              "question": "What did the tuna do?",
              "answer": "get away",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "tuna",
              "is_middle_entity": false
            },
            {
              "question": "What hunted the tuna?",
              "answer": "the shark",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "tuna",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "tuna",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was hunted do?",
              "answer": "got away",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "tuna",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the tuna's action?",
              "answer": "the submarine observing the whale which led to the whale tailing the shark which led to the shark hunting the tuna",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "tuna",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the tuna's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "tuna",
              "is_middle_entity": false
            }
          ],
          "submarine": [
            {
              "question": "What did the submarine do?",
              "answer": "observe the whale",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "submarine",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the submarine?",
              "answer": "the whale",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "submarine",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "submarine",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the submarine do?",
              "answer": "tailed the shark",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "submarine",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the submarine's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "submarine",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the submarine's involvement?",
              "answer": "the whale tailed the shark",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "submarine",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_12",
        "sentence": "The pigeon that the hawk that the eagle that the zookeeper fed followed caught flew away.",
        "structure": [
          {
            "subject": "pigeon",
            "action": "flew away",
            "object": null
          },
          {
            "subject": "hawk",
            "action": "caught",
            "object": "pigeon"
          },
          {
            "subject": "eagle",
            "action": "followed",
            "object": "hawk"
          },
          {
            "subject": "zookeeper",
            "action": "fed",
            "object": "eagle"
          }
        ],
        "middle_entity": "hawk",
        "all_entities": [
          "pigeon",
          "hawk",
          "eagle",
          "zookeeper"
        ],
        "questions_by_entity": {
          "pigeon": [
            {
              "question": "What did the pigeon do?",
              "answer": "fly away",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "pigeon",
              "is_middle_entity": false
            },
            {
              "question": "What caught the pigeon?",
              "answer": "the hawk",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "pigeon",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "pigeon",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "flew away",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "pigeon",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the pigeon's action?",
              "answer": "the zookeeper feeding the eagle which led to the eagle following the hawk which led to the hawk catching the pigeon",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "pigeon",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the pigeon's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "pigeon",
              "is_middle_entity": false
            }
          ],
          "hawk": [
            {
              "question": "What did the hawk do?",
              "answer": "catch the pigeon",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "hawk",
              "is_middle_entity": true
            },
            {
              "question": "What followed the hawk?",
              "answer": "the eagle",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "hawk",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "hawk",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was followed do?",
              "answer": "caught the pigeon",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "hawk",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the hawk's action?",
              "answer": "the zookeeper feeding the eagle which led to the eagle following the hawk",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "hawk",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the hawk's involvement?",
              "answer": "the pigeon flew away",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "hawk",
              "is_middle_entity": true
            }
          ],
          "eagle": [
            {
              "question": "What did the eagle do?",
              "answer": "follow the hawk",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "Who fed the eagle?",
              "answer": "the zookeeper",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was fed do?",
              "answer": "followed the hawk",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the eagle's action?",
              "answer": "the zookeeper feeding the eagle",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the eagle's involvement?",
              "answer": "the hawk caught the pigeon",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "eagle",
              "is_middle_entity": false
            }
          ],
          "zookeeper": [
            {
              "question": "What did the zookeeper do?",
              "answer": "feed the eagle",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the zookeeper?",
              "answer": "the eagle",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the zookeeper do?",
              "answer": "followed the hawk",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the zookeeper's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the zookeeper's involvement?",
              "answer": "the eagle followed the hawk",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "zookeeper",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_13",
        "sentence": "The butterfly that the bird that the cat that the boy adopted chased startled fluttered away.",
        "structure": [
          {
            "subject": "butterfly",
            "action": "fluttered away",
            "object": null
          },
          {
            "subject": "bird",
            "action": "startled",
            "object": "butterfly"
          },
          {
            "subject": "cat",
            "action": "chased",
            "object": "bird"
          },
          {
            "subject": "boy",
            "action": "adopted",
            "object": "cat"
          }
        ],
        "middle_entity": "bird",
        "all_entities": [
          "cat",
          "boy",
          "butterfly",
          "bird"
        ],
        "questions_by_entity": {
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "chase the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "Who adopted the cat?",
              "answer": "the boy",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was adopted do?",
              "answer": "chased the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the boy adopting the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird startled the butterfly",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "boy": [
            {
              "question": "What did the boy do?",
              "answer": "adopt the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the boy?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the boy do?",
              "answer": "chased the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the boy's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the boy's involvement?",
              "answer": "the cat chased the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": false
            }
          ],
          "butterfly": [
            {
              "question": "What did the butterfly do?",
              "answer": "flutter away",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "What startled the butterfly?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "fluttered away",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the butterfly's action?",
              "answer": "the boy adopting the cat which led to the cat chasing the bird which led to the bird startling the butterfly",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the butterfly's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "butterfly",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "startle the butterfly",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What chased the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "startled the butterfly",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the boy adopting the cat which led to the cat chasing the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the butterfly fluttered away",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_14",
        "sentence": "The worm that the chicken that the fox that the farmer spotted chased pecked wriggled.",
        "structure": [
          {
            "subject": "worm",
            "action": "wriggled",
            "object": null
          },
          {
            "subject": "chicken",
            "action": "pecked",
            "object": "worm"
          },
          {
            "subject": "fox",
            "action": "chased",
            "object": "chicken"
          },
          {
            "subject": "farmer",
            "action": "spotted",
            "object": "fox"
          }
        ],
        "middle_entity": "chicken",
        "all_entities": [
          "worm",
          "chicken",
          "fox",
          "farmer"
        ],
        "questions_by_entity": {
          "worm": [
            {
              "question": "What did the worm do?",
              "answer": "wriggle",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What pecked the worm?",
              "answer": "the chicken",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was pecked do?",
              "answer": "wriggled",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the worm's action?",
              "answer": "the farmer spotting the fox which led to the fox chasing the chicken which led to the chicken pecking the worm",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the worm's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "worm",
              "is_middle_entity": false
            }
          ],
          "chicken": [
            {
              "question": "What did the chicken do?",
              "answer": "peck the worm",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "chicken",
              "is_middle_entity": true
            },
            {
              "question": "What chased the chicken?",
              "answer": "the fox",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "chicken",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "chicken",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "pecked the worm",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "chicken",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the chicken's action?",
              "answer": "the farmer spotting the fox which led to the fox chasing the chicken",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "chicken",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the chicken's involvement?",
              "answer": "the worm wriggled",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "chicken",
              "is_middle_entity": true
            }
          ],
          "fox": [
            {
              "question": "What did the fox do?",
              "answer": "chase the chicken",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "Who spotted the fox?",
              "answer": "the farmer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was spotted do?",
              "answer": "chased the chicken",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the fox's action?",
              "answer": "the farmer spotting the fox",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the fox's involvement?",
              "answer": "the chicken pecked the worm",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": false
            }
          ],
          "farmer": [
            {
              "question": "What did the farmer do?",
              "answer": "spot the fox",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the farmer?",
              "answer": "the fox",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the farmer do?",
              "answer": "chased the chicken",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the farmer's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the farmer's involvement?",
              "answer": "the fox chased the chicken",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "farmer",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_15",
        "sentence": "The deer that the wolf that the bear that the hunter tracked stalked attacked jumped away.",
        "structure": [
          {
            "subject": "deer",
            "action": "jumped away",
            "object": null
          },
          {
            "subject": "wolf",
            "action": "attacked",
            "object": "deer"
          },
          {
            "subject": "bear",
            "action": "stalked",
            "object": "wolf"
          },
          {
            "subject": "hunter",
            "action": "tracked",
            "object": "bear"
          }
        ],
        "middle_entity": "wolf",
        "all_entities": [
          "hunter",
          "deer",
          "wolf",
          "bear"
        ],
        "questions_by_entity": {
          "hunter": [
            {
              "question": "What did the hunter do?",
              "answer": "track the bear",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the hunter?",
              "answer": "the bear",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the hunter do?",
              "answer": "stalked the wolf",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the hunter's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the hunter's involvement?",
              "answer": "the bear stalked the wolf",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            }
          ],
          "deer": [
            {
              "question": "What did the deer do?",
              "answer": "jump away",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "deer",
              "is_middle_entity": false
            },
            {
              "question": "What attacked the deer?",
              "answer": "the wolf",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "deer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "deer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was attacked do?",
              "answer": "jumped away",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "deer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the deer's action?",
              "answer": "the hunter tracking the bear which led to the bear stalking the wolf which led to the wolf attacking the deer",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "deer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the deer's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "deer",
              "is_middle_entity": false
            }
          ],
          "wolf": [
            {
              "question": "What did the wolf do?",
              "answer": "attack the deer",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What stalked the wolf?",
              "answer": "the bear",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was stalked do?",
              "answer": "attacked the deer",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the wolf's action?",
              "answer": "the hunter tracking the bear which led to the bear stalking the wolf",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the wolf's involvement?",
              "answer": "the deer jumped away",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": true
            }
          ],
          "bear": [
            {
              "question": "What did the bear do?",
              "answer": "stalk the wolf",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "Who tracked the bear?",
              "answer": "the hunter",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was tracked do?",
              "answer": "stalked the wolf",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bear's action?",
              "answer": "the hunter tracking the bear",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bear's involvement?",
              "answer": "the wolf attacked the deer",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_16",
        "sentence": "The squirrel that the cat that the dog that the girl owned chased pawed at climbed a tree.",
        "structure": [
          {
            "subject": "squirrel",
            "action": "tree",
            "object": null
          },
          {
            "subject": "cat",
            "action": "climbed",
            "object": "squirrel"
          },
          {
            "subject": "dog",
            "action": "pawed at",
            "object": "cat"
          },
          {
            "subject": "girl",
            "action": "chased",
            "object": "dog"
          }
        ],
        "middle_entity": "cat",
        "all_entities": [
          "cat",
          "dog",
          "squirrel",
          "girl"
        ],
        "questions_by_entity": {
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "pawed at the squirrel",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What chased the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "pawed at the squirrel",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the girl owning the dog which led to the dog chasing the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the squirrel climbed a tree",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "chased the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "Who owned the dog?",
              "answer": "the girl",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was owned do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the girl owning the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat pawed at the squirrel",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ],
          "squirrel": [
            {
              "question": "What did the squirrel do?",
              "answer": "climbed a tree",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "What pawed at the squirrel?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was pawed at do?",
              "answer": "climbed a tree",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the squirrel's action?",
              "answer": "the girl owning the dog which led to the dog chasing the cat which led to the cat pawing at the squirrel",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the squirrel's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "squirrel",
              "is_middle_entity": false
            }
          ],
          "girl": [
            {
              "question": "What did the girl do?",
              "answer": "owned the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the girl?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the girl do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the girl's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the girl's involvement?",
              "answer": "the dog chased the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "girl",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_17",
        "sentence": "The patient that the doctor that the nurse that the director called informed treated recovered.",
        "structure": [
          {
            "subject": "patient",
            "action": "recovered",
            "object": null
          },
          {
            "subject": "doctor",
            "action": "treated",
            "object": "patient"
          },
          {
            "subject": "nurse",
            "action": "informed",
            "object": "doctor"
          },
          {
            "subject": "director",
            "action": "called",
            "object": "nurse"
          }
        ],
        "middle_entity": "doctor",
        "all_entities": [
          "director",
          "patient",
          "doctor",
          "nurse"
        ],
        "questions_by_entity": {
          "director": [
            {
              "question": "What did the director do?",
              "answer": "call the nurse",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "director",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the director?",
              "answer": "the nurse",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "director",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "director",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the director do?",
              "answer": "informed the doctor",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "director",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the director's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "director",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the director's involvement?",
              "answer": "the nurse informed the doctor",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "director",
              "is_middle_entity": false
            }
          ],
          "patient": [
            {
              "question": "What did the patient do?",
              "answer": "recover",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "patient",
              "is_middle_entity": false
            },
            {
              "question": "Who treated the patient?",
              "answer": "the doctor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "patient",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "patient",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was treated do?",
              "answer": "recovered",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "patient",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the patient's action?",
              "answer": "the director calling the nurse which led to the nurse informing the doctor which led to the doctor treating the patient",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "patient",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the patient's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "patient",
              "is_middle_entity": false
            }
          ],
          "doctor": [
            {
              "question": "What did the doctor do?",
              "answer": "treat the patient",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "doctor",
              "is_middle_entity": true
            },
            {
              "question": "Who informed the doctor?",
              "answer": "the nurse",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "doctor",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "doctor",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was informed do?",
              "answer": "treated the patient",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "doctor",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the doctor's action?",
              "answer": "the director calling the nurse which led to the nurse informing the doctor",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "doctor",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the doctor's involvement?",
              "answer": "the patient recovered",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "doctor",
              "is_middle_entity": true
            }
          ],
          "nurse": [
            {
              "question": "What did the nurse do?",
              "answer": "inform the doctor",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "nurse",
              "is_middle_entity": false
            },
            {
              "question": "Who called the nurse?",
              "answer": "the director",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "nurse",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "nurse",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was called do?",
              "answer": "informed the doctor",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "nurse",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the nurse's action?",
              "answer": "the director calling the nurse",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "nurse",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the nurse's involvement?",
              "answer": "the doctor treated the patient",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "nurse",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_18",
        "sentence": "The suitcase that the porter that the driver that the manager hired called carried was heavy.",
        "structure": [
          {
            "subject": "suitcase",
            "action": "heavy",
            "object": null
          },
          {
            "subject": "porter",
            "action": "was",
            "object": "suitcase"
          },
          {
            "subject": "driver",
            "action": "carried",
            "object": "porter"
          },
          {
            "subject": "manager",
            "action": "called",
            "object": "driver"
          }
        ],
        "middle_entity": "porter",
        "all_entities": [
          "driver",
          "porter",
          "suitcase",
          "manager"
        ],
        "questions_by_entity": {
          "driver": [
            {
              "question": "What did the driver do?",
              "answer": "called the porter",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "driver",
              "is_middle_entity": false
            },
            {
              "question": "Who hired the driver?",
              "answer": "the manager",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "driver",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "driver",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was hired do?",
              "answer": "carried the porter",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "driver",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the driver's action?",
              "answer": "the manager hiring the driver",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "driver",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the driver's involvement?",
              "answer": "the porter carried the suitcase",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "driver",
              "is_middle_entity": false
            }
          ],
          "porter": [
            {
              "question": "What did the porter do?",
              "answer": "carried the suitcase",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "porter",
              "is_middle_entity": true
            },
            {
              "question": "Who called the porter?",
              "answer": "the driver",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "porter",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "porter",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was called do?",
              "answer": "carried the suitcase",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "porter",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the porter's action?",
              "answer": "the manager hiring the driver which led to the driver calling the porter",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "porter",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the porter's involvement?",
              "answer": "the suitcase was heavy",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "porter",
              "is_middle_entity": true
            }
          ],
          "suitcase": [
            {
              "question": "What happened to the suitcase?",
              "answer": "was heavy",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "suitcase",
              "is_middle_entity": false
            },
            {
              "question": "Who carried the suitcase?",
              "answer": "the porter",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "suitcase",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "suitcase",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was carried do?",
              "answer": "was heavy",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "suitcase",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the suitcase's action?",
              "answer": "the manager hiring the driver which led to the driver calling the porter which led to the porter carrying the suitcase",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "suitcase",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the suitcase's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "suitcase",
              "is_middle_entity": false
            }
          ],
          "manager": [
            {
              "question": "What did the manager do?",
              "answer": "hired the driver",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "manager",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the manager?",
              "answer": "the driver",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "manager",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "manager",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the manager do?",
              "answer": "called the porter",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "manager",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the manager's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "manager",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the manager's involvement?",
              "answer": "the driver called the porter",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "manager",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_19",
        "sentence": "The car that the mechanic that the engineer that the CEO assigned hired repaired started.",
        "structure": [
          {
            "subject": "car",
            "action": "started",
            "object": null
          },
          {
            "subject": "mechanic",
            "action": "repaired",
            "object": "car"
          },
          {
            "subject": "engineer",
            "action": "hired",
            "object": "mechanic"
          },
          {
            "subject": "ceo",
            "action": "assigned",
            "object": "engineer"
          }
        ],
        "middle_entity": "mechanic",
        "all_entities": [
          "ceo",
          "engineer",
          "mechanic",
          "car"
        ],
        "questions_by_entity": {
          "ceo": [
            {
              "question": "What did the ceo do?",
              "answer": "assign the engineer",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "ceo",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the ceo?",
              "answer": "the engineer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "ceo",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "ceo",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the ceo do?",
              "answer": "hired the mechanic",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "ceo",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the ceo's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "ceo",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the ceo's involvement?",
              "answer": "the engineer hired the mechanic",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "ceo",
              "is_middle_entity": false
            }
          ],
          "engineer": [
            {
              "question": "What did the engineer do?",
              "answer": "hire the mechanic",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "engineer",
              "is_middle_entity": false
            },
            {
              "question": "Who assigned the engineer?",
              "answer": "the ceo",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "engineer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "engineer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was assigned do?",
              "answer": "hired the mechanic",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "engineer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the engineer's action?",
              "answer": "the ceo assigning the engineer",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "engineer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the engineer's involvement?",
              "answer": "the mechanic repaired the car",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "engineer",
              "is_middle_entity": false
            }
          ],
          "mechanic": [
            {
              "question": "What did the mechanic do?",
              "answer": "repair the car",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mechanic",
              "is_middle_entity": true
            },
            {
              "question": "Who hired the mechanic?",
              "answer": "the engineer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mechanic",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mechanic",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was hired do?",
              "answer": "repaired the car",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mechanic",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the mechanic's action?",
              "answer": "the ceo assigning the engineer which led to the engineer hiring the mechanic",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mechanic",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the mechanic's involvement?",
              "answer": "the car started",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mechanic",
              "is_middle_entity": true
            }
          ],
          "car": [
            {
              "question": "What did the car do?",
              "answer": "start",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "car",
              "is_middle_entity": false
            },
            {
              "question": "Who repaired the car?",
              "answer": "the mechanic",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "car",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "car",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was repaired do?",
              "answer": "started",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "car",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the car's action?",
              "answer": "the ceo assigning the engineer which led to the engineer hiring the mechanic which led to the mechanic repairing the car",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "car",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the car's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "car",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_20",
        "sentence": "The raccoon that the dog that the coyote that the park ranger scared ran past startled ran away.",
        "structure": [
          {
            "subject": "raccoon",
            "action": "ran away",
            "object": null
          },
          {
            "subject": "dog",
            "action": "startled",
            "object": "raccoon"
          },
          {
            "subject": "coyote",
            "action": "ran past",
            "object": "dog"
          },
          {
            "subject": "park ranger",
            "action": "scared",
            "object": "coyote"
          }
        ],
        "middle_entity": "dog",
        "all_entities": [
          "park ranger",
          "raccoon",
          "dog",
          "coyote"
        ],
        "questions_by_entity": {
          "park ranger": [
            {
              "question": "What did the park ranger do?",
              "answer": "scare the coyote",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the park ranger?",
              "answer": "the coyote",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the park ranger do?",
              "answer": "ran past the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the park ranger's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the park ranger's involvement?",
              "answer": "the coyote ran past the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "park ranger",
              "is_middle_entity": false
            }
          ],
          "raccoon": [
            {
              "question": "What did the raccoon do?",
              "answer": "run away",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "raccoon",
              "is_middle_entity": false
            },
            {
              "question": "What startled the raccoon?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "raccoon",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "raccoon",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "ran away",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "raccoon",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the raccoon's action?",
              "answer": "the park ranger scaring the coyote which led to the coyote running past the dog which led to the dog startling the raccoon",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "raccoon",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the raccoon's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "raccoon",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "startle the raccoon",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What ran past the dog?",
              "answer": "the coyote",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was run past do?",
              "answer": "startled the raccoon",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the park ranger scaring the coyote which led to the coyote running past the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the raccoon ran away",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            }
          ],
          "coyote": [
            {
              "question": "What did the coyote do?",
              "answer": "run past the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "coyote",
              "is_middle_entity": false
            },
            {
              "question": "Who scared the coyote?",
              "answer": "the park ranger",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "coyote",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "coyote",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "ran past the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "coyote",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the coyote's action?",
              "answer": "the park ranger scaring the coyote",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "coyote",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the coyote's involvement?",
              "answer": "the dog startled the raccoon",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "coyote",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_21",
        "sentence": "The starfish that the crab that the seagull that the pelican watched pecked clawed escaped.",
        "structure": [
          {
            "subject": "starfish",
            "action": "escaped",
            "object": null
          },
          {
            "subject": "crab",
            "action": "clawed",
            "object": "starfish"
          },
          {
            "subject": "seagull",
            "action": "pecked",
            "object": "crab"
          },
          {
            "subject": "pelican",
            "action": "watched",
            "object": "seagull"
          }
        ],
        "middle_entity": "crab",
        "all_entities": [
          "crab",
          "starfish",
          "pelican",
          "seagull"
        ],
        "questions_by_entity": {
          "crab": [
            {
              "question": "What did the crab do?",
              "answer": "claw the starfish",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "crab",
              "is_middle_entity": true
            },
            {
              "question": "What pecked the crab?",
              "answer": "the seagull",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "crab",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "crab",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was pecked do?",
              "answer": "clawed the starfish",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "crab",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the crab's action?",
              "answer": "the pelican watching the seagull which led to the seagull pecking the crab",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "crab",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the crab's involvement?",
              "answer": "the starfish escaped",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "crab",
              "is_middle_entity": true
            }
          ],
          "starfish": [
            {
              "question": "What did the starfish do?",
              "answer": "escape",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "What clawed the starfish?",
              "answer": "the crab",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was clawed do?",
              "answer": "escaped",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the starfish's action?",
              "answer": "the pelican watching the seagull which led to the seagull pecking the crab which led to the crab clawing the starfish",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the starfish's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "starfish",
              "is_middle_entity": false
            }
          ],
          "pelican": [
            {
              "question": "What did the pelican do?",
              "answer": "watch the seagull",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "pelican",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the pelican?",
              "answer": "the seagull",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "pelican",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "pelican",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the pelican do?",
              "answer": "pecked the crab",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "pelican",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the pelican's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "pelican",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the pelican's involvement?",
              "answer": "the seagull pecked the crab",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "pelican",
              "is_middle_entity": false
            }
          ],
          "seagull": [
            {
              "question": "What did the seagull do?",
              "answer": "peck the crab",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "seagull",
              "is_middle_entity": false
            },
            {
              "question": "What watched the seagull?",
              "answer": "the pelican",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "seagull",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "seagull",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was watched do?",
              "answer": "pecked the crab",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "seagull",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the seagull's action?",
              "answer": "the pelican watching the seagull",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "seagull",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the seagull's involvement?",
              "answer": "the crab clawed the starfish",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "seagull",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_22",
        "sentence": "The goat that the wolf that the bear that the park ranger monitored pursued ran into bleated.",
        "structure": [
          {
            "subject": "goat",
            "action": "bleated",
            "object": null
          },
          {
            "subject": "wolf",
            "action": "ran into",
            "object": "goat"
          },
          {
            "subject": "bear",
            "action": "pursued",
            "object": "wolf"
          },
          {
            "subject": "park ranger",
            "action": "monitored",
            "object": "bear"
          }
        ],
        "middle_entity": "wolf",
        "all_entities": [
          "goat",
          "park ranger",
          "wolf",
          "bear"
        ],
        "questions_by_entity": {
          "goat": [
            {
              "question": "What did the goat do?",
              "answer": "bleat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "goat",
              "is_middle_entity": false
            },
            {
              "question": "What ran into the goat?",
              "answer": "the wolf",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "goat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "goat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was run into do?",
              "answer": "bleated",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "goat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the goat's action?",
              "answer": "the park ranger monitoring the bear which led to the bear pursuing the wolf which led to the wolf running into the goat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "goat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the goat's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "goat",
              "is_middle_entity": false
            }
          ],
          "park ranger": [
            {
              "question": "What did the park ranger do?",
              "answer": "monitor the bear",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the park ranger?",
              "answer": "the bear",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the park ranger do?",
              "answer": "pursued the wolf",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the park ranger's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the park ranger's involvement?",
              "answer": "the bear pursued the wolf",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "park ranger",
              "is_middle_entity": false
            }
          ],
          "wolf": [
            {
              "question": "What did the wolf do?",
              "answer": "run into the goat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What pursued the wolf?",
              "answer": "the bear",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was pursued do?",
              "answer": "ran into the goat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the wolf's action?",
              "answer": "the park ranger monitoring the bear which led to the bear pursuing the wolf",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the wolf's involvement?",
              "answer": "the goat bleated",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": true
            }
          ],
          "bear": [
            {
              "question": "What did the bear do?",
              "answer": "pursue the wolf",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "Who monitored the bear?",
              "answer": "the park ranger",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was monitored do?",
              "answer": "pursued the wolf",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bear's action?",
              "answer": "the park ranger monitoring the bear",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bear's involvement?",
              "answer": "the wolf ran into the goat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_23",
        "sentence": "The beetle that the bird that the cat that the girl petted startled chased escaped.",
        "structure": [
          {
            "subject": "beetle",
            "action": "escaped",
            "object": null
          },
          {
            "subject": "bird",
            "action": "chased",
            "object": "beetle"
          },
          {
            "subject": "cat",
            "action": "startled",
            "object": "bird"
          },
          {
            "subject": "girl",
            "action": "petted",
            "object": "cat"
          }
        ],
        "middle_entity": "bird",
        "all_entities": [
          "cat",
          "beetle",
          "girl",
          "bird"
        ],
        "questions_by_entity": {
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "startle the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "Who petted the cat?",
              "answer": "the girl",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was petted do?",
              "answer": "startled the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the girl petting the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird chased the beetle",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "beetle": [
            {
              "question": "What did the beetle do?",
              "answer": "escape",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "What chased the beetle?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "escaped",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the beetle's action?",
              "answer": "the girl petting the cat which led to the cat startling the bird which led to the bird chasing the beetle",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the beetle's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "beetle",
              "is_middle_entity": false
            }
          ],
          "girl": [
            {
              "question": "What did the girl do?",
              "answer": "pet the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the girl?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the girl do?",
              "answer": "startled the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the girl's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the girl's involvement?",
              "answer": "the cat startled the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "girl",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "chase the beetle",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What startled the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "chased the beetle",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the girl petting the cat which led to the cat startling the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the beetle escaped",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_24",
        "sentence": "The duck that the fox that the coyote that the hunter targeted chased saw swam away.",
        "structure": [
          {
            "subject": "duck",
            "action": "swam away",
            "object": null
          },
          {
            "subject": "fox",
            "action": "saw",
            "object": "duck"
          },
          {
            "subject": "coyote",
            "action": "chased",
            "object": "fox"
          },
          {
            "subject": "hunter",
            "action": "targeted",
            "object": "coyote"
          }
        ],
        "middle_entity": "fox",
        "all_entities": [
          "hunter",
          "coyote",
          "fox",
          "duck"
        ],
        "questions_by_entity": {
          "hunter": [
            {
              "question": "What did the hunter do?",
              "answer": "target the coyote",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the hunter?",
              "answer": "the coyote",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the hunter do?",
              "answer": "chased the fox",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the hunter's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the hunter's involvement?",
              "answer": "the coyote chased the fox",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            }
          ],
          "coyote": [
            {
              "question": "What did the coyote do?",
              "answer": "chase the fox",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "coyote",
              "is_middle_entity": false
            },
            {
              "question": "Who targeted the coyote?",
              "answer": "the hunter",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "coyote",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "coyote",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was targeted do?",
              "answer": "chased the fox",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "coyote",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the coyote's action?",
              "answer": "the hunter targeting the coyote",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "coyote",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the coyote's involvement?",
              "answer": "the fox saw the duck",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "coyote",
              "is_middle_entity": false
            }
          ],
          "fox": [
            {
              "question": "What did the fox do?",
              "answer": "see the duck",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What chased the fox?",
              "answer": "the coyote",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "saw the duck",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the fox's action?",
              "answer": "the hunter targeting the coyote which led to the coyote chasing the fox",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the fox's involvement?",
              "answer": "the duck swam away",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": true
            }
          ],
          "duck": [
            {
              "question": "What did the duck do?",
              "answer": "swim away",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "duck",
              "is_middle_entity": false
            },
            {
              "question": "What saw the duck?",
              "answer": "the fox",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "duck",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "duck",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "swam away",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "duck",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the duck's action?",
              "answer": "the hunter targeting the coyote which led to the coyote chasing the fox which led to the fox seeing the duck",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "duck",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the duck's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "duck",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_25",
        "sentence": "The moth that the bat that the owl that the falcon nudged bumped caught flew away.",
        "structure": [
          {
            "subject": "moth",
            "action": "flew away",
            "object": null
          },
          {
            "subject": "bat",
            "action": "caught",
            "object": "moth"
          },
          {
            "subject": "owl",
            "action": "bumped",
            "object": "bat"
          },
          {
            "subject": "falcon",
            "action": "nudged",
            "object": "owl"
          }
        ],
        "middle_entity": "bat",
        "all_entities": [
          "moth",
          "bat",
          "owl",
          "falcon"
        ],
        "questions_by_entity": {
          "moth": [
            {
              "question": "What did the moth do?",
              "answer": "flew away",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "moth",
              "is_middle_entity": false
            },
            {
              "question": "What caught the moth?",
              "answer": "the bat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "moth",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "moth",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "flew away",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "moth",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the moth's action?",
              "answer": "the falcon nudging the owl which led to the owl bumping the bat which led to the bat catching the moth",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "moth",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the moth's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "moth",
              "is_middle_entity": false
            }
          ],
          "bat": [
            {
              "question": "What did the bat do?",
              "answer": "caught the moth",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bat",
              "is_middle_entity": true
            },
            {
              "question": "What bumped the bat?",
              "answer": "the owl",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was bumped do?",
              "answer": "caught the moth",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the bat's action?",
              "answer": "the falcon nudging the owl which led to the owl bumping the bat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the bat's involvement?",
              "answer": "the moth flew away",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bat",
              "is_middle_entity": true
            }
          ],
          "owl": [
            {
              "question": "What did the owl do?",
              "answer": "bumped the bat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "owl",
              "is_middle_entity": false
            },
            {
              "question": "What nudged the owl?",
              "answer": "the falcon",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "owl",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "owl",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was nudged do?",
              "answer": "bumped the bat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "owl",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the owl's action?",
              "answer": "the falcon nudging the owl",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "owl",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the owl's involvement?",
              "answer": "the bat caught the moth",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "owl",
              "is_middle_entity": false
            }
          ],
          "falcon": [
            {
              "question": "What did the falcon do?",
              "answer": "nudged the owl",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "falcon",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the falcon?",
              "answer": "the owl",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "falcon",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "falcon",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the falcon do?",
              "answer": "bumped the bat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "falcon",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the falcon's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "falcon",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the falcon's involvement?",
              "answer": "the owl bumped the bat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "falcon",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_26",
        "sentence": "The zebra that the lion that the elephant that the ranger observed walked past stalked galloped away.",
        "structure": [
          {
            "subject": "zebra",
            "action": "galloped away",
            "object": null
          },
          {
            "subject": "lion",
            "action": "stalked",
            "object": "zebra"
          },
          {
            "subject": "elephant",
            "action": "walked past",
            "object": "lion"
          },
          {
            "subject": "ranger",
            "action": "observed",
            "object": "elephant"
          }
        ],
        "middle_entity": "lion",
        "all_entities": [
          "ranger",
          "elephant",
          "zebra",
          "lion"
        ],
        "questions_by_entity": {
          "ranger": [
            {
              "question": "What did the ranger do?",
              "answer": "observ the elephant",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "ranger",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the ranger?",
              "answer": "the elephant",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "ranger",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "ranger",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the ranger do?",
              "answer": "walked past the lion",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "ranger",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the ranger's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "ranger",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the ranger's involvement?",
              "answer": "the elephant walked past the lion",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "ranger",
              "is_middle_entity": false
            }
          ],
          "elephant": [
            {
              "question": "What did the elephant do?",
              "answer": "walk past the lion",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "elephant",
              "is_middle_entity": false
            },
            {
              "question": "Who observed the elephant?",
              "answer": "the ranger",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "elephant",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "elephant",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was observed do?",
              "answer": "walked past the lion",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "elephant",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the elephant's action?",
              "answer": "the ranger observing the elephant",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "elephant",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the elephant's involvement?",
              "answer": "the lion stalked the zebra",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "elephant",
              "is_middle_entity": false
            }
          ],
          "zebra": [
            {
              "question": "What did the zebra do?",
              "answer": "gallop away",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "zebra",
              "is_middle_entity": false
            },
            {
              "question": "What stalked the zebra?",
              "answer": "the lion",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "zebra",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "zebra",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was stalked do?",
              "answer": "galloped away",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "zebra",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the zebra's action?",
              "answer": "the ranger observing the elephant which led to the elephant walking past the lion which led to the lion stalking the zebra",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "zebra",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the zebra's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "zebra",
              "is_middle_entity": false
            }
          ],
          "lion": [
            {
              "question": "What did the lion do?",
              "answer": "stalk the zebra",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "lion",
              "is_middle_entity": true
            },
            {
              "question": "What walked past the lion?",
              "answer": "the elephant",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "lion",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "lion",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was walked past do?",
              "answer": "stalked the zebra",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "lion",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the lion's action?",
              "answer": "the ranger observing the elephant which led to the elephant walking past the lion",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "lion",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the lion's involvement?",
              "answer": "the zebra galloped away",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "lion",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_27",
        "sentence": "The frog that the snake that the hawk that the eagle eyed swooped on swallowed died.",
        "structure": [
          {
            "subject": "frog",
            "action": "died",
            "object": null
          },
          {
            "subject": "snake",
            "action": "swallowed",
            "object": "frog"
          },
          {
            "subject": "hawk",
            "action": "swooped on",
            "object": "snake"
          },
          {
            "subject": "eagle",
            "action": "eyed",
            "object": "hawk"
          }
        ],
        "middle_entity": "snake",
        "all_entities": [
          "frog",
          "snake",
          "hawk",
          "eagle"
        ],
        "questions_by_entity": {
          "frog": [
            {
              "question": "What did the frog do?",
              "answer": "die",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "What swallowed the frog?",
              "answer": "the snake",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was swallowed do?",
              "answer": "died",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the frog's action?",
              "answer": "the eagle eying the hawk which led to the hawk swooping on the snake which led to the snake swallowing the frog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the frog's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "frog",
              "is_middle_entity": false
            }
          ],
          "snake": [
            {
              "question": "What did the snake do?",
              "answer": "swallow the frog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What swooped on the snake?",
              "answer": "the hawk",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was swooped on do?",
              "answer": "swallowed the frog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the snake's action?",
              "answer": "the eagle eying the hawk which led to the hawk swooping on the snake",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the snake's involvement?",
              "answer": "the frog died",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": true
            }
          ],
          "hawk": [
            {
              "question": "What did the hawk do?",
              "answer": "swoop on the snake",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "hawk",
              "is_middle_entity": false
            },
            {
              "question": "What eyed the hawk?",
              "answer": "the eagle",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "hawk",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "hawk",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was eyed do?",
              "answer": "swooped on the snake",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "hawk",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the hawk's action?",
              "answer": "the eagle eying the hawk",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "hawk",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the hawk's involvement?",
              "answer": "the snake swallowed the frog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "hawk",
              "is_middle_entity": false
            }
          ],
          "eagle": [
            {
              "question": "What did the eagle do?",
              "answer": "eye the hawk",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the eagle?",
              "answer": "the hawk",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the eagle do?",
              "answer": "swooped on the snake",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the eagle's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the eagle's involvement?",
              "answer": "the hawk swooped on the snake",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "eagle",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_28",
        "sentence": "The grasshopper that the lizard that the snake that the mongoose ran from saw chased jumped away.",
        "structure": [
          {
            "subject": "grasshopper",
            "action": "jumped away",
            "object": null
          },
          {
            "subject": "lizard",
            "action": "chased",
            "object": "grasshopper"
          },
          {
            "subject": "snake",
            "action": "saw",
            "object": "lizard"
          },
          {
            "subject": "mongoose",
            "action": "ran from",
            "object": "snake"
          }
        ],
        "middle_entity": "lizard",
        "all_entities": [
          "grasshopper",
          "snake",
          "lizard",
          "mongoose"
        ],
        "questions_by_entity": {
          "grasshopper": [
            {
              "question": "What did the grasshopper do?",
              "answer": "jump away",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "grasshopper",
              "is_middle_entity": false
            },
            {
              "question": "What chased the grasshopper?",
              "answer": "the lizard",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "grasshopper",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "grasshopper",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "jumped away",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "grasshopper",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the grasshopper's action?",
              "answer": "the mongoose running from the snake which led to the snake seeing the lizard which led to the lizard chasing the grasshopper",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "grasshopper",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the grasshopper's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "grasshopper",
              "is_middle_entity": false
            }
          ],
          "snake": [
            {
              "question": "What did the snake do?",
              "answer": "see the lizard",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What ran from the snake?",
              "answer": "the mongoose",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was run from do?",
              "answer": "saw the lizard",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the snake's action?",
              "answer": "the mongoose running from the snake",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the snake's involvement?",
              "answer": "the lizard chased the grasshopper",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            }
          ],
          "lizard": [
            {
              "question": "What did the lizard do?",
              "answer": "chase the grasshopper",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "lizard",
              "is_middle_entity": true
            },
            {
              "question": "What saw the lizard?",
              "answer": "the snake",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "lizard",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "lizard",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "chased the grasshopper",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "lizard",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the lizard's action?",
              "answer": "the mongoose running from the snake which led to the snake seeing the lizard",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "lizard",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the lizard's involvement?",
              "answer": "the grasshopper jumped away",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "lizard",
              "is_middle_entity": true
            }
          ],
          "mongoose": [
            {
              "question": "What did the mongoose do?",
              "answer": "run from the snake",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mongoose",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the mongoose?",
              "answer": "the snake",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mongoose",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mongoose",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the mongoose do?",
              "answer": "saw the lizard",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mongoose",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mongoose's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mongoose",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mongoose's involvement?",
              "answer": "the snake saw the lizard",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mongoose",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_29",
        "sentence": "The goldfish that the cat that the dog that the boy owned chased eyed swam faster.",
        "structure": [
          {
            "subject": "goldfish",
            "action": "faster",
            "object": null
          },
          {
            "subject": "cat",
            "action": "swam",
            "object": "goldfish"
          },
          {
            "subject": "dog",
            "action": "eyed",
            "object": "cat"
          },
          {
            "subject": "boy",
            "action": "chased",
            "object": "dog"
          }
        ],
        "middle_entity": "cat",
        "all_entities": [
          "cat",
          "goldfish",
          "dog",
          "boy"
        ],
        "questions_by_entity": {
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "eyed the goldfish",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What chased the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "eyed the goldfish",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the boy owning the dog which led to the dog chasing the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the goldfish swam faster",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            }
          ],
          "goldfish": [
            {
              "question": "What did the goldfish do?",
              "answer": "swim faster",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "What eyed the goldfish?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was eyed do?",
              "answer": "swam faster",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the goldfish's action?",
              "answer": "the boy owning the dog which led to the dog chasing the cat which led to the cat eyeing the goldfish",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the goldfish's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "goldfish",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "chased the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "Who owned the dog?",
              "answer": "the boy",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was owned do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the boy owning the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat eyed the goldfish",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ],
          "boy": [
            {
              "question": "What did the boy do?",
              "answer": "owned the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the boy?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the boy do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the boy's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the boy's involvement?",
              "answer": "the dog chased the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      },
      {
        "id": "complexity_3_sentence_30",
        "sentence": "The lamb that the wolf that the bear that the hunter targeted chased startled bleated loudly.",
        "structure": [
          {
            "subject": "lamb",
            "action": "bleated",
            "object": null
          },
          {
            "subject": "wolf",
            "action": "startled",
            "object": "lamb"
          },
          {
            "subject": "bear",
            "action": "chased",
            "object": "wolf"
          },
          {
            "subject": "hunter",
            "action": "targeted",
            "object": "bear"
          }
        ],
        "middle_entity": "wolf",
        "all_entities": [
          "hunter",
          "wolf",
          "bear",
          "lamb"
        ],
        "questions_by_entity": {
          "hunter": [
            {
              "question": "What did the hunter do?",
              "answer": "target the bear",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the hunter?",
              "answer": "the bear",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the hunter do?",
              "answer": "chased the wolf",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the hunter's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the hunter's involvement?",
              "answer": "the bear chased the wolf",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            }
          ],
          "wolf": [
            {
              "question": "What did the wolf do?",
              "answer": "startle the lamb",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What chased the wolf?",
              "answer": "the bear",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "startled the lamb",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the wolf's action?",
              "answer": "the hunter targeting the bear which led to the bear chasing the wolf",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the wolf's involvement?",
              "answer": "the lamb bleated",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": true
            }
          ],
          "bear": [
            {
              "question": "What did the bear do?",
              "answer": "chase the wolf",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "Who targeted the bear?",
              "answer": "the hunter",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was targeted do?",
              "answer": "chased the wolf",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bear's action?",
              "answer": "the hunter targeting the bear",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bear's involvement?",
              "answer": "the wolf startled the lamb",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": false
            }
          ],
          "lamb": [
            {
              "question": "What did the lamb do?",
              "answer": "bleat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "lamb",
              "is_middle_entity": false
            },
            {
              "question": "What startled the lamb?",
              "answer": "the wolf",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "lamb",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "4",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "lamb",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "bleated",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "lamb",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the lamb's action?",
              "answer": "the hunter targeting the bear which led to the bear chasing the wolf which led to the wolf startling the lamb",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "lamb",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the lamb's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "lamb",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 24
      }
    ],
    "total_questions": 714,
    "entities_processed": 119,
    "middle_entities_flagged": 30
  },
  "complexity_4": {
    "sentences": [
      {
        "id": "complexity_4_sentence_1",
        "sentence": "The bee that the spider that the frog that the snake that the eagle spotted chased caught trapped buzzed.",
        "structure": [
          {
            "subject": "bee",
            "action": "buzzed",
            "object": null
          },
          {
            "subject": "spider",
            "action": "trapped",
            "object": "bee"
          },
          {
            "subject": "frog",
            "action": "caught",
            "object": "spider"
          },
          {
            "subject": "snake",
            "action": "chased",
            "object": "frog"
          },
          {
            "subject": "eagle",
            "action": "spotted",
            "object": "snake"
          }
        ],
        "middle_entity": "frog",
        "all_entities": [
          "frog",
          "eagle",
          "spider",
          "bee",
          "snake"
        ],
        "questions_by_entity": {
          "frog": [
            {
              "question": "What did the frog do?",
              "answer": "catch the spider",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "frog",
              "is_middle_entity": true
            },
            {
              "question": "What chased the frog?",
              "answer": "the snake",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "frog",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "frog",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "caught the spider",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "frog",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the frog's action?",
              "answer": "the eagle spotting the snake which led to the snake chasing the frog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "frog",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the frog's involvement?",
              "answer": "the spider trapped the bee",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "frog",
              "is_middle_entity": true
            }
          ],
          "eagle": [
            {
              "question": "What did the eagle do?",
              "answer": "spot the snake",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the eagle?",
              "answer": "the snake",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the eagle do?",
              "answer": "chased the frog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the eagle's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the eagle's involvement?",
              "answer": "the snake chased the frog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "eagle",
              "is_middle_entity": false
            }
          ],
          "spider": [
            {
              "question": "What did the spider do?",
              "answer": "trap the bee",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What caught the spider?",
              "answer": "the frog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "trapped the bee",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the spider's action?",
              "answer": "the eagle spotting the snake which led to the snake chasing the frog which led to the frog catching the spider",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the spider's involvement?",
              "answer": "the bee buzzed",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            }
          ],
          "bee": [
            {
              "question": "What did the bee do?",
              "answer": "buzz",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bee",
              "is_middle_entity": false
            },
            {
              "question": "What trapped the bee?",
              "answer": "the spider",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bee",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bee",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was trapped do?",
              "answer": "buzzed",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bee",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bee's action?",
              "answer": "the eagle spotting the snake which led to the snake chasing the frog which led to the frog catching the spider which led to the spider trapping the bee",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bee",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bee's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bee",
              "is_middle_entity": false
            }
          ],
          "snake": [
            {
              "question": "What did the snake do?",
              "answer": "chase the frog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What spotted the snake?",
              "answer": "the eagle",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was spotted do?",
              "answer": "chased the frog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the snake's action?",
              "answer": "the eagle spotting the snake",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the snake's involvement?",
              "answer": "the frog caught the spider",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_2",
        "sentence": "The mouse that the cat that the dog that the mailman that the neighbor saw scared chased caught squeaked.",
        "structure": [
          {
            "subject": "mouse",
            "action": "squeaked",
            "object": null
          },
          {
            "subject": "cat",
            "action": "caught",
            "object": "mouse"
          },
          {
            "subject": "dog",
            "action": "chased",
            "object": "cat"
          },
          {
            "subject": "mailman",
            "action": "scared",
            "object": "dog"
          },
          {
            "subject": "neighbor",
            "action": "saw",
            "object": "mailman"
          }
        ],
        "middle_entity": "dog",
        "all_entities": [
          "mailman",
          "dog",
          "mouse",
          "cat",
          "neighbor"
        ],
        "questions_by_entity": {
          "mailman": [
            {
              "question": "What did the mailman do?",
              "answer": "scare the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "Who saw the mailman?",
              "answer": "the neighbor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "scared the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mailman's action?",
              "answer": "the neighbor seeing the mailman",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mailman's involvement?",
              "answer": "the dog chased the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mailman",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "chase the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "Who scared the dog?",
              "answer": "the mailman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the neighbor seeing the mailman which led to the mailman scaring the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat caught the mouse",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            }
          ],
          "mouse": [
            {
              "question": "What did the mouse do?",
              "answer": "squeak",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What caught the mouse?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "squeaked",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mouse's action?",
              "answer": "the neighbor seeing the mailman which led to the mailman scaring the dog which led to the dog chasing the cat which led to the cat catching the mouse",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mouse's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mouse",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "catch the mouse",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What chased the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "caught the mouse",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the neighbor seeing the mailman which led to the mailman scaring the dog which led to the dog chasing the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the mouse squeaked",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "neighbor": [
            {
              "question": "What did the neighbor do?",
              "answer": "see the mailman",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "neighbor",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the neighbor?",
              "answer": "the mailman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "neighbor",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "neighbor",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the neighbor do?",
              "answer": "scared the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "neighbor",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the neighbor's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "neighbor",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the neighbor's involvement?",
              "answer": "the mailman scared the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "neighbor",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_3",
        "sentence": "The rabbit that the fox that the wolf that the hunter that the park ranger warned saw chased caught hopped.",
        "structure": [
          {
            "subject": "rabbit",
            "action": "hopped",
            "object": null
          },
          {
            "subject": "fox",
            "action": "caught",
            "object": "rabbit"
          },
          {
            "subject": "wolf",
            "action": "chased",
            "object": "fox"
          },
          {
            "subject": "hunter",
            "action": "saw",
            "object": "wolf"
          },
          {
            "subject": "park ranger",
            "action": "warned",
            "object": "hunter"
          }
        ],
        "middle_entity": "wolf",
        "all_entities": [
          "rabbit",
          "park ranger",
          "fox",
          "hunter",
          "wolf"
        ],
        "questions_by_entity": {
          "rabbit": [
            {
              "question": "What did the rabbit do?",
              "answer": "hop",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What caught the rabbit?",
              "answer": "the fox",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "hopped",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the rabbit's action?",
              "answer": "the park ranger warning the hunter which led to the hunter seeing the wolf which led to the wolf chasing the fox which led to the fox catching the rabbit",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the rabbit's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "rabbit",
              "is_middle_entity": false
            }
          ],
          "park ranger": [
            {
              "question": "What did the park ranger do?",
              "answer": "warn the hunter",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the park ranger?",
              "answer": "the hunter",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the park ranger do?",
              "answer": "saw the wolf",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the park ranger's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the park ranger's involvement?",
              "answer": "the hunter saw the wolf",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "park ranger",
              "is_middle_entity": false
            }
          ],
          "fox": [
            {
              "question": "What did the fox do?",
              "answer": "catch the rabbit",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What chased the fox?",
              "answer": "the wolf",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "caught the rabbit",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the fox's action?",
              "answer": "the park ranger warning the hunter which led to the hunter seeing the wolf which led to the wolf chasing the fox",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the fox's involvement?",
              "answer": "the rabbit hopped",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": false
            }
          ],
          "hunter": [
            {
              "question": "What did the hunter do?",
              "answer": "see the wolf",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "Who warned the hunter?",
              "answer": "the park ranger",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was warned do?",
              "answer": "saw the wolf",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the hunter's action?",
              "answer": "the park ranger warning the hunter",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the hunter's involvement?",
              "answer": "the wolf chased the fox",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            }
          ],
          "wolf": [
            {
              "question": "What did the wolf do?",
              "answer": "chase the fox",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "Who saw the wolf?",
              "answer": "the hunter",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "chased the fox",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the wolf's action?",
              "answer": "the park ranger warning the hunter which led to the hunter seeing the wolf",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the wolf's involvement?",
              "answer": "the fox caught the rabbit",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_4",
        "sentence": "The fish that the heron that the eagle that the hiker that the guide led spotted caught dropped escaped.",
        "structure": [
          {
            "subject": "fish",
            "action": "escaped",
            "object": null
          },
          {
            "subject": "heron",
            "action": "chased",
            "object": "fish"
          },
          {
            "subject": "eagle",
            "action": "caught",
            "object": "heron"
          },
          {
            "subject": "hiker",
            "action": "spotted",
            "object": "eagle"
          },
          {
            "subject": "guide",
            "action": "led",
            "object": "hiker"
          }
        ],
        "middle_entity": "eagle",
        "all_entities": [
          "eagle",
          "guide",
          "heron",
          "fish",
          "hiker"
        ],
        "questions_by_entity": {
          "eagle": [
            {
              "question": "What did the eagle do?",
              "answer": "catch the heron",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "eagle",
              "is_middle_entity": true
            },
            {
              "question": "Who spotted the eagle?",
              "answer": "the hiker",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "eagle",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "eagle",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was spotted do?",
              "answer": "caught the heron",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "eagle",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the eagle's action?",
              "answer": "the guide leading the hiker which led to the hiker spotting the eagle",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "eagle",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the eagle's involvement?",
              "answer": "the heron dropped the fish",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "eagle",
              "is_middle_entity": true
            }
          ],
          "guide": [
            {
              "question": "What did the guide do?",
              "answer": "lead the hiker",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "guide",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the guide?",
              "answer": "the hiker",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "guide",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "guide",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the guide do?",
              "answer": "spotted the eagle",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "guide",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the guide's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "guide",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the guide's involvement?",
              "answer": "the hiker spotted the eagle",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "guide",
              "is_middle_entity": false
            }
          ],
          "heron": [
            {
              "question": "What did the heron do?",
              "answer": "drop the fish",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "heron",
              "is_middle_entity": false
            },
            {
              "question": "What caught the heron?",
              "answer": "the eagle",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "heron",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "heron",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "dropped the fish",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "heron",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the heron's action?",
              "answer": "the guide leading the hiker which led to the hiker spotting the eagle which led to the eagle catching the heron",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "heron",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the heron's involvement?",
              "answer": "the fish escaped",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "heron",
              "is_middle_entity": false
            }
          ],
          "fish": [
            {
              "question": "What did the fish do?",
              "answer": "escape",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fish",
              "is_middle_entity": false
            },
            {
              "question": "What dropped the fish?",
              "answer": "the heron",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fish",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fish",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was dropped do?",
              "answer": "escaped",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fish",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the fish's action?",
              "answer": "the guide leading the hiker which led to the hiker spotting the eagle which led to the eagle catching the heron which led to the heron dropping the fish",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fish",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the fish's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fish",
              "is_middle_entity": false
            }
          ],
          "hiker": [
            {
              "question": "What did the hiker do?",
              "answer": "spot the eagle",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "hiker",
              "is_middle_entity": false
            },
            {
              "question": "Who led the hiker?",
              "answer": "the guide",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "hiker",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "hiker",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was led do?",
              "answer": "spotted the eagle",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "hiker",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the hiker's action?",
              "answer": "the guide leading the hiker",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "hiker",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the hiker's involvement?",
              "answer": "the eagle caught the heron",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "hiker",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_5",
        "sentence": "The worm that the bird that the cat that the child that the teacher supervised scared caught ate died.",
        "structure": [
          {
            "subject": "worm",
            "action": "died",
            "object": null
          },
          {
            "subject": "bird",
            "action": "ate",
            "object": "worm"
          },
          {
            "subject": "cat",
            "action": "caught",
            "object": "bird"
          },
          {
            "subject": "child",
            "action": "scared",
            "object": "cat"
          },
          {
            "subject": "teacher",
            "action": "supervised",
            "object": "child"
          }
        ],
        "middle_entity": "cat",
        "all_entities": [
          "teacher",
          "worm",
          "child",
          "bird",
          "cat"
        ],
        "questions_by_entity": {
          "teacher": [
            {
              "question": "What did the teacher do?",
              "answer": "supervise the child",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the teacher?",
              "answer": "the child",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the teacher do?",
              "answer": "scared the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the teacher's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the teacher's involvement?",
              "answer": "the child scared the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "teacher",
              "is_middle_entity": false
            }
          ],
          "worm": [
            {
              "question": "What did the worm do?",
              "answer": "die",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What ate the worm?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was eaten do?",
              "answer": "died",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the worm's action?",
              "answer": "the teacher supervising the child which led to the child scaring the cat which led to the cat catching the bird which led to the bird eating the worm",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the worm's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "worm",
              "is_middle_entity": false
            }
          ],
          "child": [
            {
              "question": "What did the child do?",
              "answer": "scare the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "Who supervised the child?",
              "answer": "the teacher",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was supervised do?",
              "answer": "scared the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the child's action?",
              "answer": "the teacher supervising the child",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the child's involvement?",
              "answer": "the cat caught the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "eat the worm",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What caught the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "ate the worm",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the teacher supervising the child which led to the child scaring the cat which led to the cat catching the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the worm died",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "catch the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "Who scared the cat?",
              "answer": "the child",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "caught the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the teacher supervising the child which led to the child scaring the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird ate the worm",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_6",
        "sentence": "The fly that the spider that the bird that the cat that the owner fed chased caught ate died.",
        "structure": [
          {
            "subject": "fly",
            "action": "died",
            "object": null
          },
          {
            "subject": "spider",
            "action": "ate",
            "object": "fly"
          },
          {
            "subject": "bird",
            "action": "caught",
            "object": "spider"
          },
          {
            "subject": "cat",
            "action": "chased",
            "object": "bird"
          },
          {
            "subject": "owner",
            "action": "fed",
            "object": "cat"
          }
        ],
        "middle_entity": "bird",
        "all_entities": [
          "spider",
          "owner",
          "bird",
          "cat",
          "fly"
        ],
        "questions_by_entity": {
          "spider": [
            {
              "question": "What did the spider do?",
              "answer": "eat the fly",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What caught the spider?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "ate the fly",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the spider's action?",
              "answer": "the owner feeding the cat which led to the cat chasing the bird which led to the bird catching the spider",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the spider's involvement?",
              "answer": "the fly died",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            }
          ],
          "owner": [
            {
              "question": "What did the owner do?",
              "answer": "feed the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "owner",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the owner?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "owner",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "owner",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the owner do?",
              "answer": "chased the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "owner",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the owner's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "owner",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the owner's involvement?",
              "answer": "the cat chased the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "owner",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "catch the spider",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What chased the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "caught the spider",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the owner feeding the cat which led to the cat chasing the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the spider ate the fly",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": true
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "chase the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "Who fed the cat?",
              "answer": "the owner",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was fed do?",
              "answer": "chased the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the owner feeding the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird caught the spider",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "fly": [
            {
              "question": "What did the fly do?",
              "answer": "die",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What ate the fly?",
              "answer": "the spider",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was eaten do?",
              "answer": "died",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the fly's action?",
              "answer": "the owner feeding the cat which led to the cat chasing the bird which led to the bird catching the spider which led to the spider eating the fly",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the fly's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fly",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_7",
        "sentence": "The squirrel that the cat that the dog that the postman that the resident called scared chased caught chattered.",
        "structure": [
          {
            "subject": "squirrel",
            "action": "chattered",
            "object": null
          },
          {
            "subject": "cat",
            "action": "caught",
            "object": "squirrel"
          },
          {
            "subject": "dog",
            "action": "chased",
            "object": "cat"
          },
          {
            "subject": "postman",
            "action": "scared",
            "object": "dog"
          },
          {
            "subject": "resident",
            "action": "called",
            "object": "postman"
          }
        ],
        "middle_entity": "dog",
        "all_entities": [
          "resident",
          "dog",
          "squirrel",
          "cat",
          "postman"
        ],
        "questions_by_entity": {
          "resident": [
            {
              "question": "What did the resident do?",
              "answer": "call the postman",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "resident",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the resident?",
              "answer": "the postman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "resident",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "resident",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the resident do?",
              "answer": "scared the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "resident",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the resident's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "resident",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the resident's involvement?",
              "answer": "the postman scared the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "resident",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "chase the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "Who scared the dog?",
              "answer": "the postman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the resident calling the postman which led to the postman scaring the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat caught the squirrel",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            }
          ],
          "squirrel": [
            {
              "question": "What did the squirrel do?",
              "answer": "chatter",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "What caught the squirrel?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "chattered",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the squirrel's action?",
              "answer": "the resident calling the postman which led to the postman scaring the dog which led to the dog chasing the cat which led to the cat catching the squirrel",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the squirrel's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "squirrel",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "catch the squirrel",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What chased the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "caught the squirrel",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the resident calling the postman which led to the postman scaring the dog which led to the dog chasing the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the squirrel chattered",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "postman": [
            {
              "question": "What did the postman do?",
              "answer": "scare the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "postman",
              "is_middle_entity": false
            },
            {
              "question": "Who called the postman?",
              "answer": "the resident",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "postman",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "postman",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was called do?",
              "answer": "scared the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "postman",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the postman's action?",
              "answer": "the resident calling the postman",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "postman",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the postman's involvement?",
              "answer": "the dog chased the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "postman",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_8",
        "sentence": "The bird that the cat that the dog that the policeman that the citizen alerted left chased caught chirped.",
        "structure": [
          {
            "subject": "bird",
            "action": "chirped",
            "object": null
          },
          {
            "subject": "cat",
            "action": "caught",
            "object": "bird"
          },
          {
            "subject": "dog",
            "action": "chased",
            "object": "cat"
          },
          {
            "subject": "policeman",
            "action": "left",
            "object": "dog"
          },
          {
            "subject": "citizen",
            "action": "alerted",
            "object": "policeman"
          }
        ],
        "middle_entity": "dog",
        "all_entities": [
          "bird",
          "cat",
          "dog",
          "policeman",
          "citizen"
        ],
        "questions_by_entity": {
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "chirped",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What caught the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "chirped",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the citizen alerted the policeman which led to the policeman leaving the dog which led to the dog chasing the cat which led to the cat catching the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "caught the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What chased the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "caught the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the citizen alerted the policeman which led to the policeman leaving the dog which led to the dog chasing the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird chirped",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "chased the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "Who left the dog?",
              "answer": "the policeman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was left do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the citizen alerted the policeman which led to the policeman leaving the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat caught the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            }
          ],
          "policeman": [
            {
              "question": "What did the policeman do?",
              "answer": "left the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "policeman",
              "is_middle_entity": false
            },
            {
              "question": "Who alerted the policeman?",
              "answer": "the citizen",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "policeman",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "policeman",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was alerted do?",
              "answer": "left the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "policeman",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the policeman's action?",
              "answer": "the citizen alerted the policeman",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "policeman",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the policeman's involvement?",
              "answer": "the dog chased the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "policeman",
              "is_middle_entity": false
            }
          ],
          "citizen": [
            {
              "question": "What did the citizen do?",
              "answer": "alerted the policeman",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "citizen",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the citizen?",
              "answer": "the policeman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "citizen",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "citizen",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the citizen do?",
              "answer": "left the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "citizen",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the citizen's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "citizen",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the citizen's involvement?",
              "answer": "the policeman left the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "citizen",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_9",
        "sentence": "The butterfly that the bird that the cat that the gardener that the homeowner hired scared caught ate died.",
        "structure": [
          {
            "subject": "butterfly",
            "action": "died",
            "object": null
          },
          {
            "subject": "bird",
            "action": "ate",
            "object": "butterfly"
          },
          {
            "subject": "cat",
            "action": "caught",
            "object": "bird"
          },
          {
            "subject": "gardener",
            "action": "scared",
            "object": "cat"
          },
          {
            "subject": "homeowner",
            "action": "hired",
            "object": "gardener"
          }
        ],
        "middle_entity": "cat",
        "all_entities": [
          "butterfly",
          "homeowner",
          "gardener",
          "bird",
          "cat"
        ],
        "questions_by_entity": {
          "butterfly": [
            {
              "question": "What did the butterfly do?",
              "answer": "die",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "What ate the butterfly?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was eaten do?",
              "answer": "died",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the butterfly's action?",
              "answer": "the homeowner hiring the gardener which led to the gardener scaring the cat which led to the cat catching the bird which led to the bird eating the butterfly",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the butterfly's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "butterfly",
              "is_middle_entity": false
            }
          ],
          "homeowner": [
            {
              "question": "What did the homeowner do?",
              "answer": "hire the gardener",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "homeowner",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the homeowner?",
              "answer": "the gardener",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "homeowner",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "homeowner",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the homeowner do?",
              "answer": "scared the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "homeowner",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the homeowner's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "homeowner",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the homeowner's involvement?",
              "answer": "the gardener scared the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "homeowner",
              "is_middle_entity": false
            }
          ],
          "gardener": [
            {
              "question": "What did the gardener do?",
              "answer": "scare the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "gardener",
              "is_middle_entity": false
            },
            {
              "question": "Who hired the gardener?",
              "answer": "the homeowner",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "gardener",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "gardener",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was hired do?",
              "answer": "scared the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "gardener",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the gardener's action?",
              "answer": "the homeowner hiring the gardener",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "gardener",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the gardener's involvement?",
              "answer": "the cat caught the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "gardener",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "eat the butterfly",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What caught the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "ate the butterfly",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the homeowner hiring the gardener which led to the gardener scaring the cat which led to the cat catching the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the butterfly died",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "catch the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "Who scared the cat?",
              "answer": "the gardener",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "caught the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the homeowner hiring the gardener which led to the gardener scaring the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird ate the butterfly",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_10",
        "sentence": "The parrot that the cat that the dog that the vet that the owner called treated chased caught squawked.",
        "structure": [
          {
            "subject": "parrot",
            "action": "squawked",
            "object": null
          },
          {
            "subject": "cat",
            "action": "caught",
            "object": "parrot"
          },
          {
            "subject": "dog",
            "action": "chased",
            "object": "cat"
          },
          {
            "subject": "vet",
            "action": "treated",
            "object": "dog"
          },
          {
            "subject": "owner",
            "action": "called",
            "object": "vet"
          }
        ],
        "middle_entity": "dog",
        "all_entities": [
          "parrot",
          "dog",
          "vet",
          "owner",
          "cat"
        ],
        "questions_by_entity": {
          "parrot": [
            {
              "question": "What did the parrot do?",
              "answer": "squawk",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "What caught the parrot?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "squawked",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the parrot's action?",
              "answer": "the owner calling the vet which led to the vet treating the dog which led to the dog chasing the cat which led to the cat catching the parrot",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the parrot's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "parrot",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "chase the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "Who treated the dog?",
              "answer": "the vet",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was treated do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the owner calling the vet which led to the vet treating the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat caught the parrot",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            }
          ],
          "vet": [
            {
              "question": "What did the vet do?",
              "answer": "treat the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "vet",
              "is_middle_entity": false
            },
            {
              "question": "Who called the vet?",
              "answer": "the owner",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "vet",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "vet",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was called do?",
              "answer": "treated the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "vet",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the vet's action?",
              "answer": "the owner calling the vet",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "vet",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the vet's involvement?",
              "answer": "the dog chased the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "vet",
              "is_middle_entity": false
            }
          ],
          "owner": [
            {
              "question": "What did the owner do?",
              "answer": "call the vet",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "owner",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the owner?",
              "answer": "the vet",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "owner",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "owner",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the owner do?",
              "answer": "treated the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "owner",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the owner's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "owner",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the owner's involvement?",
              "answer": "the vet treated the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "owner",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "catch the parrot",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What chased the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "caught the parrot",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the owner calling the vet which led to the vet treating the dog which led to the dog chasing the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the parrot squawked",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_11",
        "sentence": "The starfish that the octopus that the shark that the diver that the captain saw scared caught ate died.",
        "structure": [
          {
            "subject": "starfish",
            "action": "died",
            "object": null
          },
          {
            "subject": "octopus",
            "action": "ate",
            "object": "starfish"
          },
          {
            "subject": "shark",
            "action": "caught",
            "object": "octopus"
          },
          {
            "subject": "diver",
            "action": "scared",
            "object": "shark"
          },
          {
            "subject": "captain",
            "action": "saw",
            "object": "diver"
          }
        ],
        "middle_entity": "shark",
        "all_entities": [
          "starfish",
          "octopus",
          "captain",
          "shark",
          "diver"
        ],
        "questions_by_entity": {
          "starfish": [
            {
              "question": "What did the starfish do?",
              "answer": "die",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "What ate the starfish?",
              "answer": "the octopus",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was eaten do?",
              "answer": "died",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the starfish's action?",
              "answer": "the captain seeing the diver which led to the diver scaring the shark which led to the shark catching the octopus which led to the octopus eating the starfish",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the starfish's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "starfish",
              "is_middle_entity": false
            }
          ],
          "octopus": [
            {
              "question": "What did the octopus do?",
              "answer": "eat the starfish",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "octopus",
              "is_middle_entity": false
            },
            {
              "question": "What caught the octopus?",
              "answer": "the shark",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "octopus",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "octopus",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "ate the starfish",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "octopus",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the octopus's action?",
              "answer": "the captain seeing the diver which led to the diver scaring the shark which led to the shark catching the octopus",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "octopus",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the octopus's involvement?",
              "answer": "the starfish died",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "octopus",
              "is_middle_entity": false
            }
          ],
          "captain": [
            {
              "question": "What did the captain do?",
              "answer": "see the diver",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "captain",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the captain?",
              "answer": "the diver",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "captain",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "captain",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the captain do?",
              "answer": "scared the shark",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "captain",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the captain's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "captain",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the captain's involvement?",
              "answer": "the diver scared the shark",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "captain",
              "is_middle_entity": false
            }
          ],
          "shark": [
            {
              "question": "What did the shark do?",
              "answer": "catch the octopus",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "shark",
              "is_middle_entity": true
            },
            {
              "question": "Who scared the shark?",
              "answer": "the diver",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "shark",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "shark",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "caught the octopus",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "shark",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the shark's action?",
              "answer": "the captain seeing the diver which led to the diver scaring the shark",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "shark",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the shark's involvement?",
              "answer": "the octopus ate the starfish",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "shark",
              "is_middle_entity": true
            }
          ],
          "diver": [
            {
              "question": "What did the diver do?",
              "answer": "scare the shark",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "diver",
              "is_middle_entity": false
            },
            {
              "question": "Who saw the diver?",
              "answer": "the captain",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "diver",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "diver",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "scared the shark",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "diver",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the diver's action?",
              "answer": "the captain seeing the diver",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "diver",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the diver's involvement?",
              "answer": "the shark caught the octopus",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "diver",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_12",
        "sentence": "The chicken that the fox that the wolf that the farmer that the sheriff warned saw chased caught clucked.",
        "structure": [
          {
            "subject": "chicken",
            "action": "clucked",
            "object": null
          },
          {
            "subject": "fox",
            "action": "caught",
            "object": "chicken"
          },
          {
            "subject": "wolf",
            "action": "chased",
            "object": "fox"
          },
          {
            "subject": "farmer",
            "action": "saw",
            "object": "wolf"
          },
          {
            "subject": "sheriff",
            "action": "warned",
            "object": "farmer"
          }
        ],
        "middle_entity": "wolf",
        "all_entities": [
          "sheriff",
          "farmer",
          "fox",
          "chicken",
          "wolf"
        ],
        "questions_by_entity": {
          "sheriff": [
            {
              "question": "What did the sheriff do?",
              "answer": "warn the farmer",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "sheriff",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the sheriff?",
              "answer": "the farmer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "sheriff",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "sheriff",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the sheriff do?",
              "answer": "saw the wolf",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "sheriff",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the sheriff's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "sheriff",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the sheriff's involvement?",
              "answer": "the farmer saw the wolf",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "sheriff",
              "is_middle_entity": false
            }
          ],
          "farmer": [
            {
              "question": "What did the farmer do?",
              "answer": "see the wolf",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "Who warned the farmer?",
              "answer": "the sheriff",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was warned do?",
              "answer": "saw the wolf",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the farmer's action?",
              "answer": "the sheriff warning the farmer",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the farmer's involvement?",
              "answer": "the wolf chased the fox",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "farmer",
              "is_middle_entity": false
            }
          ],
          "fox": [
            {
              "question": "What did the fox do?",
              "answer": "catch the chicken",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What chased the fox?",
              "answer": "the wolf",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "caught the chicken",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the fox's action?",
              "answer": "the sheriff warning the farmer which led to the farmer seeing the wolf which led to the wolf chasing the fox",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the fox's involvement?",
              "answer": "the chicken clucked",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": false
            }
          ],
          "chicken": [
            {
              "question": "What did the chicken do?",
              "answer": "cluck",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "What caught the chicken?",
              "answer": "the fox",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "clucked",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the chicken's action?",
              "answer": "the sheriff warning the farmer which led to the farmer seeing the wolf which led to the wolf chasing the fox which led to the fox catching the chicken",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the chicken's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "chicken",
              "is_middle_entity": false
            }
          ],
          "wolf": [
            {
              "question": "What did the wolf do?",
              "answer": "chase the fox",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "Who saw the wolf?",
              "answer": "the farmer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "chased the fox",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the wolf's action?",
              "answer": "the sheriff warning the farmer which led to the farmer seeing the wolf",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the wolf's involvement?",
              "answer": "the fox caught the chicken",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_13",
        "sentence": "The ladybug that the bird that the cat that the child that the nanny watched scared caught ate died.",
        "structure": [
          {
            "subject": "ladybug",
            "action": "died",
            "object": null
          },
          {
            "subject": "bird",
            "action": "ate",
            "object": "ladybug"
          },
          {
            "subject": "cat",
            "action": "caught",
            "object": "bird"
          },
          {
            "subject": "child",
            "action": "scared",
            "object": "cat"
          },
          {
            "subject": "nanny",
            "action": "watched",
            "object": "child"
          }
        ],
        "middle_entity": "cat",
        "all_entities": [
          "ladybug",
          "nanny",
          "child",
          "bird",
          "cat"
        ],
        "questions_by_entity": {
          "ladybug": [
            {
              "question": "What did the ladybug do?",
              "answer": "die",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "ladybug",
              "is_middle_entity": false
            },
            {
              "question": "What ate the ladybug?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "ladybug",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "ladybug",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was eaten do?",
              "answer": "died",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "ladybug",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the ladybug's action?",
              "answer": "the nanny watching the child which led to the child scaring the cat which led to the cat catching the bird which led to the bird eating the ladybug",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "ladybug",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the ladybug's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "ladybug",
              "is_middle_entity": false
            }
          ],
          "nanny": [
            {
              "question": "What did the nanny do?",
              "answer": "watch the child",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "nanny",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the nanny?",
              "answer": "the child",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "nanny",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "nanny",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the nanny do?",
              "answer": "scared the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "nanny",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the nanny's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "nanny",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the nanny's involvement?",
              "answer": "the child scared the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "nanny",
              "is_middle_entity": false
            }
          ],
          "child": [
            {
              "question": "What did the child do?",
              "answer": "scare the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "Who watched the child?",
              "answer": "the nanny",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was watched do?",
              "answer": "scared the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the child's action?",
              "answer": "the nanny watching the child",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the child's involvement?",
              "answer": "the cat caught the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "eat the ladybug",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What caught the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "ate the ladybug",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the nanny watching the child which led to the child scaring the cat which led to the cat catching the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the ladybug died",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "catch the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "Who scared the cat?",
              "answer": "the child",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "caught the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the nanny watching the child which led to the child scaring the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird ate the ladybug",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_14",
        "sentence": "The goldfish that the cat that the dog that the plumber that the landlord called scared chased caught escaped.",
        "structure": [
          {
            "subject": "goldfish",
            "action": "escaped",
            "object": null
          },
          {
            "subject": "cat",
            "action": "caught",
            "object": "goldfish"
          },
          {
            "subject": "dog",
            "action": "chased",
            "object": "cat"
          },
          {
            "subject": "plumber",
            "action": "scared",
            "object": "dog"
          },
          {
            "subject": "landlord",
            "action": "called",
            "object": "plumber"
          }
        ],
        "middle_entity": "dog",
        "all_entities": [
          "dog",
          "plumber",
          "landlord",
          "cat",
          "goldfish"
        ],
        "questions_by_entity": {
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "chase the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "Who scared the dog?",
              "answer": "the plumber",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the landlord calling the plumber which led to the plumber scaring the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat caught the goldfish",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            }
          ],
          "plumber": [
            {
              "question": "What did the plumber do?",
              "answer": "scare the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "plumber",
              "is_middle_entity": false
            },
            {
              "question": "Who called the plumber?",
              "answer": "the landlord",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "plumber",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "plumber",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was called do?",
              "answer": "scared the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "plumber",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the plumber's action?",
              "answer": "the landlord calling the plumber",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "plumber",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the plumber's involvement?",
              "answer": "the dog chased the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "plumber",
              "is_middle_entity": false
            }
          ],
          "landlord": [
            {
              "question": "What did the landlord do?",
              "answer": "call the plumber",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "landlord",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the landlord?",
              "answer": "the plumber",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "landlord",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "landlord",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the landlord do?",
              "answer": "scared the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "landlord",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the landlord's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "landlord",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the landlord's involvement?",
              "answer": "the plumber scared the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "landlord",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "catch the goldfish",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What chased the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "caught the goldfish",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the landlord calling the plumber which led to the plumber scaring the dog which led to the dog chasing the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the goldfish escaped",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "goldfish": [
            {
              "question": "What did the goldfish do?",
              "answer": "escape",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "What caught the goldfish?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "escaped",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the goldfish's action?",
              "answer": "the landlord calling the plumber which led to the plumber scaring the dog which led to the dog chasing the cat which led to the cat catching the goldfish",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the goldfish's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "goldfish",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_15",
        "sentence": "The duck that the fox that the dog that the hunter that the forester advised scared chased caught quacked.",
        "structure": [
          {
            "subject": "duck",
            "action": "quacked",
            "object": null
          },
          {
            "subject": "fox",
            "action": "caught",
            "object": "duck"
          },
          {
            "subject": "dog",
            "action": "chased",
            "object": "fox"
          },
          {
            "subject": "hunter",
            "action": "scared",
            "object": "dog"
          },
          {
            "subject": "forester",
            "action": "advised",
            "object": "hunter"
          }
        ],
        "middle_entity": "dog",
        "all_entities": [
          "dog",
          "fox",
          "duck",
          "hunter",
          "forester"
        ],
        "questions_by_entity": {
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "chase the fox",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "Who scared the dog?",
              "answer": "the hunter",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "chased the fox",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the forester advising the hunter which led to the hunter scaring the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the fox caught the duck",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            }
          ],
          "fox": [
            {
              "question": "What did the fox do?",
              "answer": "catch the duck",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What chased the fox?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "caught the duck",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the fox's action?",
              "answer": "the forester advising the hunter which led to the hunter scaring the dog which led to the dog chasing the fox",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the fox's involvement?",
              "answer": "the duck quacked",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": false
            }
          ],
          "duck": [
            {
              "question": "What did the duck do?",
              "answer": "quack",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "duck",
              "is_middle_entity": false
            },
            {
              "question": "What caught the duck?",
              "answer": "the fox",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "duck",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "duck",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "quacked",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "duck",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the duck's action?",
              "answer": "the forester advising the hunter which led to the hunter scaring the dog which led to the dog chasing the fox which led to the fox catching the duck",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "duck",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the duck's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "duck",
              "is_middle_entity": false
            }
          ],
          "hunter": [
            {
              "question": "What did the hunter do?",
              "answer": "scare the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "Who advised the hunter?",
              "answer": "the forester",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was advised do?",
              "answer": "scared the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the hunter's action?",
              "answer": "the forester advising the hunter",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the hunter's involvement?",
              "answer": "the dog chased the fox",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            }
          ],
          "forester": [
            {
              "question": "What did the forester do?",
              "answer": "advise the hunter",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "forester",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the forester?",
              "answer": "the hunter",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "forester",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "forester",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the forester do?",
              "answer": "scared the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "forester",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the forester's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "forester",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the forester's involvement?",
              "answer": "the hunter scared the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "forester",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_16",
        "sentence": "The bee that the bird that the cat that the jogger that the coach trained scared caught ate died.",
        "structure": [
          {
            "subject": "bee",
            "action": "died",
            "object": null
          },
          {
            "subject": "bird",
            "action": "ate",
            "object": "bee"
          },
          {
            "subject": "cat",
            "action": "caught",
            "object": "bird"
          },
          {
            "subject": "jogger",
            "action": "scared",
            "object": "cat"
          },
          {
            "subject": "coach",
            "action": "trained",
            "object": "jogger"
          }
        ],
        "middle_entity": "cat",
        "all_entities": [
          "coach",
          "jogger",
          "bird",
          "bee",
          "cat"
        ],
        "questions_by_entity": {
          "coach": [
            {
              "question": "What did the coach do?",
              "answer": "train the jogger",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "coach",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the coach?",
              "answer": "the jogger",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "coach",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "coach",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the coach do?",
              "answer": "scared the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "coach",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the coach's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "coach",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the coach's involvement?",
              "answer": "the jogger scared the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "coach",
              "is_middle_entity": false
            }
          ],
          "jogger": [
            {
              "question": "What did the jogger do?",
              "answer": "scare the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "jogger",
              "is_middle_entity": false
            },
            {
              "question": "Who trained the jogger?",
              "answer": "the coach",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "jogger",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "jogger",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was trained do?",
              "answer": "scared the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "jogger",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the jogger's action?",
              "answer": "the coach training the jogger",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "jogger",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the jogger's involvement?",
              "answer": "the cat caught the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "jogger",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "eat the bee",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What caught the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "ate the bee",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the coach training the jogger which led to the jogger scaring the cat which led to the cat catching the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the bee died",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "bee": [
            {
              "question": "What did the bee do?",
              "answer": "die",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bee",
              "is_middle_entity": false
            },
            {
              "question": "What ate the bee?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bee",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bee",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was eaten do?",
              "answer": "died",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bee",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bee's action?",
              "answer": "the coach training the jogger which led to the jogger scaring the cat which led to the cat catching the bird which led to the bird eating the bee",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bee",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bee's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bee",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "catch the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "Who scared the cat?",
              "answer": "the jogger",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "caught the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the coach training the jogger which led to the jogger scaring the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird ate the bee",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_17",
        "sentence": "The worm that the chicken that the fox that the farmer that the wife woke up scared caught ate died.",
        "structure": [
          {
            "subject": "worm",
            "action": "died",
            "object": null
          },
          {
            "subject": "chicken",
            "action": "ate",
            "object": "worm"
          },
          {
            "subject": "fox",
            "action": "caught",
            "object": "chicken"
          },
          {
            "subject": "farmer",
            "action": "scared",
            "object": "fox"
          },
          {
            "subject": "wife",
            "action": "woke up",
            "object": "farmer"
          }
        ],
        "middle_entity": "fox",
        "all_entities": [
          "farmer",
          "worm",
          "fox",
          "wife",
          "chicken"
        ],
        "questions_by_entity": {
          "farmer": [
            {
              "question": "What did the farmer do?",
              "answer": "scare the fox",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "Who woke up the farmer?",
              "answer": "the wife",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was woken up do?",
              "answer": "scared the fox",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the farmer's action?",
              "answer": "the wife waking up the farmer",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the farmer's involvement?",
              "answer": "the fox caught the chicken",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "farmer",
              "is_middle_entity": false
            }
          ],
          "worm": [
            {
              "question": "What did the worm do?",
              "answer": "die",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What ate the worm?",
              "answer": "the chicken",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was eaten do?",
              "answer": "died",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the worm's action?",
              "answer": "the wife waking up the farmer which led to the farmer scaring the fox which led to the fox catching the chicken which led to the chicken eating the worm",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the worm's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "worm",
              "is_middle_entity": false
            }
          ],
          "fox": [
            {
              "question": "What did the fox do?",
              "answer": "catch the chicken",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "Who scared the fox?",
              "answer": "the farmer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "caught the chicken",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the fox's action?",
              "answer": "the wife waking up the farmer which led to the farmer scaring the fox",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the fox's involvement?",
              "answer": "the chicken ate the worm",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": true
            }
          ],
          "wife": [
            {
              "question": "What did the wife do?",
              "answer": "wake up the farmer",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "wife",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the wife?",
              "answer": "the farmer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "wife",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "wife",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the wife do?",
              "answer": "scared the fox",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "wife",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the wife's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "wife",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the wife's involvement?",
              "answer": "the farmer scared the fox",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "wife",
              "is_middle_entity": false
            }
          ],
          "chicken": [
            {
              "question": "What did the chicken do?",
              "answer": "eat the worm",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "What caught the chicken?",
              "answer": "the fox",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "ate the worm",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the chicken's action?",
              "answer": "the wife waking up the farmer which led to the farmer scaring the fox which led to the fox catching the chicken",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the chicken's involvement?",
              "answer": "the worm died",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "chicken",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_18",
        "sentence": "The beetle that the bird that the cat that the toddler that the mother watched scared caught saw crawled.",
        "structure": [
          {
            "subject": "beetle",
            "action": "crawled",
            "object": null
          },
          {
            "subject": "bird",
            "action": "saw",
            "object": "beetle"
          },
          {
            "subject": "cat",
            "action": "caught",
            "object": "bird"
          },
          {
            "subject": "toddler",
            "action": "scared",
            "object": "cat"
          },
          {
            "subject": "mother",
            "action": "watched",
            "object": "toddler"
          }
        ],
        "middle_entity": "cat",
        "all_entities": [
          "toddler",
          "mother",
          "beetle",
          "bird",
          "cat"
        ],
        "questions_by_entity": {
          "toddler": [
            {
              "question": "What did the toddler do?",
              "answer": "scare the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "toddler",
              "is_middle_entity": false
            },
            {
              "question": "Who watched the toddler?",
              "answer": "the mother",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "toddler",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "toddler",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was watched do?",
              "answer": "scared the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "toddler",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the toddler's action?",
              "answer": "the mother watching the toddler",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "toddler",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the toddler's involvement?",
              "answer": "the cat caught the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "toddler",
              "is_middle_entity": false
            }
          ],
          "mother": [
            {
              "question": "What did the mother do?",
              "answer": "watch the toddler",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the mother?",
              "answer": "the toddler",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the mother do?",
              "answer": "scared the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mother's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mother's involvement?",
              "answer": "the toddler scared the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mother",
              "is_middle_entity": false
            }
          ],
          "beetle": [
            {
              "question": "What did the beetle do?",
              "answer": "crawl",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "What saw the beetle?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "crawled",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the beetle's action?",
              "answer": "the mother watching the toddler which led to the toddler scaring the cat which led to the cat catching the bird which led to the bird seeing the beetle",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the beetle's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "beetle",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "see the beetle",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What caught the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "see the beetle",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the mother watching the toddler which led to the toddler scaring the cat which led to the cat catching the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the beetle crawled",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "catch the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "Who scared the cat?",
              "answer": "the toddler",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "caught the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the mother watching the toddler which led to the toddler scaring the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird saw the beetle",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_19",
        "sentence": "The fly that the spider that the bird that the photographer that the editor sent photographed saw caught buzzed.",
        "structure": [
          {
            "subject": "fly",
            "action": "buzzed",
            "object": null
          },
          {
            "subject": "spider",
            "action": "caught",
            "object": "fly"
          },
          {
            "subject": "bird",
            "action": "saw",
            "object": "spider"
          },
          {
            "subject": "photographer",
            "action": "photographed",
            "object": "bird"
          },
          {
            "subject": "editor",
            "action": "sent",
            "object": "photographer"
          }
        ],
        "middle_entity": "bird",
        "all_entities": [
          "spider",
          "bird",
          "photographer",
          "editor",
          "fly"
        ],
        "questions_by_entity": {
          "spider": [
            {
              "question": "What did the spider do?",
              "answer": "catch the fly",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What saw the spider?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "caught the fly",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the spider's action?",
              "answer": "the editor sending the photographer which led to the photographer photographing the bird which led to the bird seeing the spider",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the spider's involvement?",
              "answer": "the fly buzzed",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "see the spider",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "Who photographed the bird?",
              "answer": "the photographer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was photographed do?",
              "answer": "saw the spider",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the editor sending the photographer which led to the photographer photographing the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the spider caught the fly",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": true
            }
          ],
          "photographer": [
            {
              "question": "What did the photographer do?",
              "answer": "photograph the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "photographer",
              "is_middle_entity": false
            },
            {
              "question": "Who sent the photographer?",
              "answer": "the editor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "photographer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "photographer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was sent do?",
              "answer": "photographed the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "photographer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the photographer's action?",
              "answer": "the editor sending the photographer",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "photographer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the photographer's involvement?",
              "answer": "the bird saw the spider",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "photographer",
              "is_middle_entity": false
            }
          ],
          "editor": [
            {
              "question": "What did the editor do?",
              "answer": "send the photographer",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "editor",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the editor?",
              "answer": "the photographer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "editor",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "editor",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the editor do?",
              "answer": "photographed the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "editor",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the editor's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "editor",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the editor's involvement?",
              "answer": "the photographer photographed the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "editor",
              "is_middle_entity": false
            }
          ],
          "fly": [
            {
              "question": "What did the fly do?",
              "answer": "buzz",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What caught the fly?",
              "answer": "the spider",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "buzzed",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the fly's action?",
              "answer": "the editor sending the photographer which led to the photographer photographing the bird which led to the bird seeing the spider which led to the spider catching the fly",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the fly's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fly",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_20",
        "sentence": "The caterpillar that the bird that the cat that the girl that the teacher praised scared chased caught wiggled.",
        "structure": [
          {
            "subject": "caterpillar",
            "action": "wiggled",
            "object": null
          },
          {
            "subject": "bird",
            "action": "caught",
            "object": "caterpillar"
          },
          {
            "subject": "cat",
            "action": "chased",
            "object": "bird"
          },
          {
            "subject": "girl",
            "action": "scared",
            "object": "cat"
          },
          {
            "subject": "teacher",
            "action": "praised",
            "object": "girl"
          }
        ],
        "middle_entity": "cat",
        "all_entities": [
          "caterpillar",
          "girl",
          "teacher",
          "bird",
          "cat"
        ],
        "questions_by_entity": {
          "caterpillar": [
            {
              "question": "What did the caterpillar do?",
              "answer": "wiggle",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "caterpillar",
              "is_middle_entity": false
            },
            {
              "question": "What caught the caterpillar?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "caterpillar",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "caterpillar",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "wiggled",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "caterpillar",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the caterpillar's action?",
              "answer": "the teacher praising the girl which led to the girl scaring the cat which led to the cat chasing the bird which led to the bird catching the caterpillar",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "caterpillar",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the caterpillar's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "caterpillar",
              "is_middle_entity": false
            }
          ],
          "girl": [
            {
              "question": "What did the girl do?",
              "answer": "scare the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "Who praised the girl?",
              "answer": "the teacher",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was praised do?",
              "answer": "scared the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the girl's action?",
              "answer": "the teacher praising the girl",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the girl's involvement?",
              "answer": "the cat chased the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "girl",
              "is_middle_entity": false
            }
          ],
          "teacher": [
            {
              "question": "What did the teacher do?",
              "answer": "praise the girl",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the teacher?",
              "answer": "the girl",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the teacher do?",
              "answer": "scared the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the teacher's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the teacher's involvement?",
              "answer": "the girl scared the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "teacher",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "catch the caterpillar",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What chased the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "caught the caterpillar",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the teacher praising the girl which led to the girl scaring the cat which led to the cat chasing the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the caterpillar wiggled",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "chase the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "Who scared the cat?",
              "answer": "the girl",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "chased the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the teacher praising the girl which led to the girl scaring the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird caught the caterpillar",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_21",
        "sentence": "The rat that the cat that the dog that the security guard that the manager hired scared chased caught squeaked.",
        "structure": [
          {
            "subject": "rat",
            "action": "squeaked",
            "object": null
          },
          {
            "subject": "cat",
            "action": "caught",
            "object": "rat"
          },
          {
            "subject": "dog",
            "action": "chased",
            "object": "cat"
          },
          {
            "subject": "security guard",
            "action": "scared",
            "object": "dog"
          },
          {
            "subject": "manager",
            "action": "hired",
            "object": "security guard"
          }
        ],
        "middle_entity": "dog",
        "all_entities": [
          "dog",
          "rat",
          "security guard",
          "manager",
          "cat"
        ],
        "questions_by_entity": {
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "chase the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "Who scared the dog?",
              "answer": "the security guard",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the manager hiring the security guard which led to the security guard scaring the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat caught the rat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            }
          ],
          "rat": [
            {
              "question": "What did the rat do?",
              "answer": "squeak",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "rat",
              "is_middle_entity": false
            },
            {
              "question": "What caught the rat?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "rat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "rat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "squeaked",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "rat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the rat's action?",
              "answer": "the manager hiring the security guard which led to the security guard scaring the dog which led to the dog chasing the cat which led to the cat catching the rat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "rat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the rat's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "rat",
              "is_middle_entity": false
            }
          ],
          "security guard": [
            {
              "question": "What did the security guard do?",
              "answer": "scare the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "security guard",
              "is_middle_entity": false
            },
            {
              "question": "Who hired the security guard?",
              "answer": "the manager",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "security guard",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "security guard",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was hired do?",
              "answer": "scared the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "security guard",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the security guard's action?",
              "answer": "the manager hiring the security guard",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "security guard",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the security guard's involvement?",
              "answer": "the dog chased the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "security guard",
              "is_middle_entity": false
            }
          ],
          "manager": [
            {
              "question": "What did the manager do?",
              "answer": "hire the security guard",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "manager",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the manager?",
              "answer": "the security guard",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "manager",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "manager",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the manager do?",
              "answer": "scared the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "manager",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the manager's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "manager",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the manager's involvement?",
              "answer": "the security guard scared the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "manager",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "catch the rat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What chased the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "caught the rat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the manager hiring the security guard which led to the security guard scaring the dog which led to the dog chasing the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the rat squeaked",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_22",
        "sentence": "The butterfly that the bird that the cat that the boy that the grandfather took care of scared caught chased died.",
        "structure": [
          {
            "subject": "butterfly",
            "action": "died",
            "object": null
          },
          {
            "subject": "bird",
            "action": "chased",
            "object": "butterfly"
          },
          {
            "subject": "cat",
            "action": "caught",
            "object": "bird"
          },
          {
            "subject": "boy",
            "action": "scared",
            "object": "cat"
          },
          {
            "subject": "grandfather",
            "action": "took care of",
            "object": "boy"
          }
        ],
        "middle_entity": "cat",
        "all_entities": [
          "butterfly",
          "grandfather",
          "bird",
          "cat",
          "boy"
        ],
        "questions_by_entity": {
          "butterfly": [
            {
              "question": "What did the butterfly do?",
              "answer": "died",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "What chased the butterfly?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "died",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the butterfly's action?",
              "answer": "the grandfather taking care of the boy which led to the boy scaring the cat which led to the cat catching the bird which led to the bird chasing the butterfly",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the butterfly's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "butterfly",
              "is_middle_entity": false
            }
          ],
          "grandfather": [
            {
              "question": "What did the grandfather do?",
              "answer": "take care of the boy",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "grandfather",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the grandfather?",
              "answer": "the boy",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "grandfather",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "grandfather",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the grandfather do?",
              "answer": "scared the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "grandfather",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the grandfather's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "grandfather",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the grandfather's involvement?",
              "answer": "the boy scared the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "grandfather",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "chase the butterfly",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What caught the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "chased the butterfly",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the grandfather taking care of the boy which led to the boy scaring the cat which led to the cat catching the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the butterfly died",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "catch the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "Who scared the cat?",
              "answer": "the boy",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "caught the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the grandfather taking care of the boy which led to the boy scaring the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird chased the butterfly",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            }
          ],
          "boy": [
            {
              "question": "What did the boy do?",
              "answer": "scare the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "Who took care of the boy?",
              "answer": "the grandfather",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was taken care of do?",
              "answer": "scared the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the boy's action?",
              "answer": "the grandfather taking care of the boy",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the boy's involvement?",
              "answer": "the cat caught the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_23",
        "sentence": "The cricket that the bird that the cat that the woman that the police officer helped scared caught ate chirped.",
        "structure": [
          {
            "subject": "cricket",
            "action": "chirped",
            "object": null
          },
          {
            "subject": "bird",
            "action": "ate",
            "object": "cricket"
          },
          {
            "subject": "cat",
            "action": "caught",
            "object": "bird"
          },
          {
            "subject": "woman",
            "action": "scared",
            "object": "cat"
          },
          {
            "subject": "police officer",
            "action": "helped",
            "object": "woman"
          }
        ],
        "middle_entity": "cat",
        "all_entities": [
          "police officer",
          "woman",
          "bird",
          "cat",
          "cricket"
        ],
        "questions_by_entity": {
          "police officer": [
            {
              "question": "What did the police officer do?",
              "answer": "help the woman",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "police officer",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the police officer?",
              "answer": "the woman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "police officer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "police officer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the police officer do?",
              "answer": "scared the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "police officer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the police officer's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "police officer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the police officer's involvement?",
              "answer": "the woman scared the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "police officer",
              "is_middle_entity": false
            }
          ],
          "woman": [
            {
              "question": "What did the woman do?",
              "answer": "scare the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "woman",
              "is_middle_entity": false
            },
            {
              "question": "Who helped the woman?",
              "answer": "the police officer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "woman",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "woman",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was helped do?",
              "answer": "scared the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "woman",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the woman's action?",
              "answer": "the police officer helping the woman",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "woman",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the woman's involvement?",
              "answer": "the cat caught the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "woman",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "eat the cricket",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What caught the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "ate the cricket",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the police officer helping the woman which led to the woman scaring the cat which led to the cat catching the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the cricket chirped",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "catch the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "Who scared the cat?",
              "answer": "the woman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "caught the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the police officer helping the woman which led to the woman scaring the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird ate the cricket",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            }
          ],
          "cricket": [
            {
              "question": "What did the cricket do?",
              "answer": "chirp",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cricket",
              "is_middle_entity": false
            },
            {
              "question": "What ate the cricket?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cricket",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cricket",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was eaten do?",
              "answer": "chirped",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cricket",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cricket's action?",
              "answer": "the police officer helping the woman which led to the woman scaring the cat which led to the cat catching the bird which led to the bird eating the cricket",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cricket",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cricket's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cricket",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_24",
        "sentence": "The ant that the spider that the lizard that the bird that the tourist spotted chased caught dropped crawled.",
        "structure": [
          {
            "subject": "ant",
            "action": "crawled",
            "object": null
          },
          {
            "subject": "spider",
            "action": "dropped",
            "object": "ant"
          },
          {
            "subject": "lizard",
            "action": "caught",
            "object": "spider"
          },
          {
            "subject": "bird",
            "action": "chased",
            "object": "lizard"
          },
          {
            "subject": "tourist",
            "action": "spotted",
            "object": "bird"
          }
        ],
        "middle_entity": "lizard",
        "all_entities": [
          "ant",
          "spider",
          "lizard",
          "bird",
          "tourist"
        ],
        "questions_by_entity": {
          "ant": [
            {
              "question": "What did the ant do?",
              "answer": "crawled",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "What dropped the ant?",
              "answer": "the spider",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was dropped do?",
              "answer": "crawled",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the ant's action?",
              "answer": "the tourist spotted the bird which led to the bird chasing the lizard which led to the lizard catching the spider which led to the spider dropping the ant",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the ant's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "ant",
              "is_middle_entity": false
            }
          ],
          "spider": [
            {
              "question": "What did the spider do?",
              "answer": "dropped the ant",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What caught the spider?",
              "answer": "the lizard",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "dropped the ant",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the spider's action?",
              "answer": "the tourist spotted the bird which led to the bird chasing the lizard which led to the lizard catching the spider",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the spider's involvement?",
              "answer": "the ant crawled",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            }
          ],
          "lizard": [
            {
              "question": "What did the lizard do?",
              "answer": "caught the spider",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "lizard",
              "is_middle_entity": true
            },
            {
              "question": "What chased the lizard?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "lizard",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "lizard",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "caught the spider",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "lizard",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the lizard's action?",
              "answer": "the tourist spotted the bird which led to the bird chasing the lizard",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "lizard",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the lizard's involvement?",
              "answer": "the spider dropped the ant",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "lizard",
              "is_middle_entity": true
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "chased the lizard",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "Who spotted the bird?",
              "answer": "the tourist",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was spotted do?",
              "answer": "chased the lizard",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the tourist spotted the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the lizard caught the spider",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "tourist": [
            {
              "question": "What did the tourist do?",
              "answer": "spotted the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "tourist",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the tourist?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "tourist",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "tourist",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the tourist do?",
              "answer": "chased the lizard",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "tourist",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the tourist's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "tourist",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the tourist's involvement?",
              "answer": "the bird chased the lizard",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "tourist",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_25",
        "sentence": "The worm that the bird that the cat that the vet that the pet owner consulted scared caught ate died.",
        "structure": [
          {
            "subject": "worm",
            "action": "died",
            "object": null
          },
          {
            "subject": "bird",
            "action": "ate",
            "object": "worm"
          },
          {
            "subject": "cat",
            "action": "caught",
            "object": "bird"
          },
          {
            "subject": "vet",
            "action": "scared",
            "object": "cat"
          },
          {
            "subject": "pet owner",
            "action": "consulted",
            "object": "vet"
          }
        ],
        "middle_entity": "cat",
        "all_entities": [
          "pet owner",
          "vet",
          "worm",
          "bird",
          "cat"
        ],
        "questions_by_entity": {
          "pet owner": [
            {
              "question": "What did the pet owner do?",
              "answer": "consult the vet",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "pet owner",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the pet owner?",
              "answer": "the vet",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "pet owner",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "pet owner",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the pet owner do?",
              "answer": "scared the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "pet owner",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the pet owner's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "pet owner",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the pet owner's involvement?",
              "answer": "the vet scared the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "pet owner",
              "is_middle_entity": false
            }
          ],
          "vet": [
            {
              "question": "What did the vet do?",
              "answer": "scare the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "vet",
              "is_middle_entity": false
            },
            {
              "question": "Who consulted the vet?",
              "answer": "the pet owner",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "vet",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "vet",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was consulted do?",
              "answer": "scared the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "vet",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the vet's action?",
              "answer": "the pet owner consulting the vet",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "vet",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the vet's involvement?",
              "answer": "the cat caught the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "vet",
              "is_middle_entity": false
            }
          ],
          "worm": [
            {
              "question": "What did the worm do?",
              "answer": "die",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What ate the worm?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was eaten do?",
              "answer": "died",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the worm's action?",
              "answer": "the pet owner consulting the vet which led to the vet scaring the cat which led to the cat catching the bird which led to the bird eating the worm",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the worm's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "worm",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "eat the worm",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What caught the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "ate the worm",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the pet owner consulting the vet which led to the vet scaring the cat which led to the cat catching the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the worm died",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "catch the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "Who scared the cat?",
              "answer": "the vet",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "caught the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the pet owner consulting the vet which led to the vet scaring the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird ate the worm",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_26",
        "sentence": "The mouse that the cat that the dog that the delivery man that the tenant saw scared chased caught squeaked.",
        "structure": [
          {
            "subject": "mouse",
            "action": "squeaked",
            "object": null
          },
          {
            "subject": "cat",
            "action": "caught",
            "object": "mouse"
          },
          {
            "subject": "dog",
            "action": "chased",
            "object": "cat"
          },
          {
            "subject": "man",
            "action": "scared",
            "object": "dog"
          },
          {
            "subject": "tenant",
            "action": "saw",
            "object": "man"
          }
        ],
        "middle_entity": "dog",
        "all_entities": [
          "man",
          "dog",
          "mouse",
          "tenant",
          "cat"
        ],
        "questions_by_entity": {
          "man": [
            {
              "question": "What did the man do?",
              "answer": "scare the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "man",
              "is_middle_entity": false
            },
            {
              "question": "Who saw the man?",
              "answer": "the tenant",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "man",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "man",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "scared the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "man",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the man's action?",
              "answer": "the tenant seeing the man",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "man",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the man's involvement?",
              "answer": "the dog chased the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "man",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "chase the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "Who scared the dog?",
              "answer": "the man",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the tenant seeing the man which led to the man scaring the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat caught the mouse",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            }
          ],
          "mouse": [
            {
              "question": "What did the mouse do?",
              "answer": "squeak",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What caught the mouse?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "squeaked",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mouse's action?",
              "answer": "the tenant seeing the man which led to the man scaring the dog which led to the dog chasing the cat which led to the cat catching the mouse",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mouse's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mouse",
              "is_middle_entity": false
            }
          ],
          "tenant": [
            {
              "question": "What did the tenant do?",
              "answer": "see the man",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "tenant",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the tenant?",
              "answer": "the man",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "tenant",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "tenant",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the tenant do?",
              "answer": "scared the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "tenant",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the tenant's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "tenant",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the tenant's involvement?",
              "answer": "the man scared the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "tenant",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "catch the mouse",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What chased the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "caught the mouse",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the tenant seeing the man which led to the man scaring the dog which led to the dog chasing the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the mouse squeaked",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_27",
        "sentence": "The fly that the frog that the snake that the zookeeper that the director observed fed caught chased buzzed.",
        "structure": [
          {
            "subject": "fly",
            "action": "buzzed",
            "object": null
          },
          {
            "subject": "frog",
            "action": "chased",
            "object": "fly"
          },
          {
            "subject": "snake",
            "action": "caught",
            "object": "frog"
          },
          {
            "subject": "zookeeper",
            "action": "fed",
            "object": "snake"
          },
          {
            "subject": "director",
            "action": "observed",
            "object": "zookeeper"
          }
        ],
        "middle_entity": "snake",
        "all_entities": [
          "director",
          "frog",
          "zookeeper",
          "snake",
          "fly"
        ],
        "questions_by_entity": {
          "director": [
            {
              "question": "What did the director do?",
              "answer": "observ the zookeeper",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "director",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the director?",
              "answer": "the zookeeper",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "director",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "director",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the director do?",
              "answer": "fed the snake",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "director",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the director's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "director",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the director's involvement?",
              "answer": "the zookeeper fed the snake",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "director",
              "is_middle_entity": false
            }
          ],
          "frog": [
            {
              "question": "What did the frog do?",
              "answer": "chase the fly",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "What caught the frog?",
              "answer": "the snake",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "chased the fly",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the frog's action?",
              "answer": "the director observing the zookeeper which led to the zookeeper feeding the snake which led to the snake catching the frog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the frog's involvement?",
              "answer": "the fly buzzed",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "frog",
              "is_middle_entity": false
            }
          ],
          "zookeeper": [
            {
              "question": "What did the zookeeper do?",
              "answer": "feed the snake",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "Who observed the zookeeper?",
              "answer": "the director",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was observed do?",
              "answer": "fed the snake",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the zookeeper's action?",
              "answer": "the director observing the zookeeper",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the zookeeper's involvement?",
              "answer": "the snake caught the frog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "zookeeper",
              "is_middle_entity": false
            }
          ],
          "snake": [
            {
              "question": "What did the snake do?",
              "answer": "catch the frog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "Who fed the snake?",
              "answer": "the zookeeper",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was fed do?",
              "answer": "caught the frog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the snake's action?",
              "answer": "the director observing the zookeeper which led to the zookeeper feeding the snake",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the snake's involvement?",
              "answer": "the frog chased the fly",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": true
            }
          ],
          "fly": [
            {
              "question": "What did the fly do?",
              "answer": "buzz",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What chased the fly?",
              "answer": "the frog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "buzzed",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the fly's action?",
              "answer": "the director observing the zookeeper which led to the zookeeper feeding the snake which led to the snake catching the frog which led to the frog chasing the fly",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the fly's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fly",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_28",
        "sentence": "The rabbit that the fox that the wolf that the trapper that the conservationist warned scared caught ate died.",
        "structure": [
          {
            "subject": "rabbit",
            "action": "died",
            "object": null
          },
          {
            "subject": "fox",
            "action": "ate",
            "object": "rabbit"
          },
          {
            "subject": "wolf",
            "action": "caught",
            "object": "fox"
          },
          {
            "subject": "trapper",
            "action": "scared",
            "object": "wolf"
          },
          {
            "subject": "conservationist",
            "action": "warned",
            "object": "trapper"
          }
        ],
        "middle_entity": "wolf",
        "all_entities": [
          "rabbit",
          "conservationist",
          "fox",
          "trapper",
          "wolf"
        ],
        "questions_by_entity": {
          "rabbit": [
            {
              "question": "What did the rabbit do?",
              "answer": "die",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What ate the rabbit?",
              "answer": "the fox",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was eaten do?",
              "answer": "died",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the rabbit's action?",
              "answer": "the conservationist warning the trapper which led to the trapper scaring the wolf which led to the wolf catching the fox which led to the fox eating the rabbit",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the rabbit's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "rabbit",
              "is_middle_entity": false
            }
          ],
          "conservationist": [
            {
              "question": "What did the conservationist do?",
              "answer": "warn the trapper",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "conservationist",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the conservationist?",
              "answer": "the trapper",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "conservationist",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "conservationist",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the conservationist do?",
              "answer": "scared the wolf",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "conservationist",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the conservationist's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "conservationist",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the conservationist's involvement?",
              "answer": "the trapper scared the wolf",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "conservationist",
              "is_middle_entity": false
            }
          ],
          "fox": [
            {
              "question": "What did the fox do?",
              "answer": "eat the rabbit",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What caught the fox?",
              "answer": "the wolf",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "ate the rabbit",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the fox's action?",
              "answer": "the conservationist warning the trapper which led to the trapper scaring the wolf which led to the wolf catching the fox",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the fox's involvement?",
              "answer": "the rabbit died",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": false
            }
          ],
          "trapper": [
            {
              "question": "What did the trapper do?",
              "answer": "scare the wolf",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "trapper",
              "is_middle_entity": false
            },
            {
              "question": "Who warned the trapper?",
              "answer": "the conservationist",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "trapper",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "trapper",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was warned do?",
              "answer": "scared the wolf",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "trapper",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the trapper's action?",
              "answer": "the conservationist warning the trapper",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "trapper",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the trapper's involvement?",
              "answer": "the wolf caught the fox",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "trapper",
              "is_middle_entity": false
            }
          ],
          "wolf": [
            {
              "question": "What did the wolf do?",
              "answer": "catch the fox",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "Who scared the wolf?",
              "answer": "the trapper",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "caught the fox",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the wolf's action?",
              "answer": "the conservationist warning the trapper which led to the trapper scaring the wolf",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the wolf's involvement?",
              "answer": "the fox ate the rabbit",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_29",
        "sentence": "The beetle that the bird that the cat that the gardener that the homeowner employed scared caught chased crawled.",
        "structure": [
          {
            "subject": "beetle",
            "action": "crawled",
            "object": null
          },
          {
            "subject": "bird",
            "action": "chased",
            "object": "beetle"
          },
          {
            "subject": "cat",
            "action": "caught",
            "object": "bird"
          },
          {
            "subject": "gardener",
            "action": "scared",
            "object": "cat"
          },
          {
            "subject": "homeowner",
            "action": "employed",
            "object": "gardener"
          }
        ],
        "middle_entity": "cat",
        "all_entities": [
          "homeowner",
          "beetle",
          "gardener",
          "bird",
          "cat"
        ],
        "questions_by_entity": {
          "homeowner": [
            {
              "question": "What did the homeowner do?",
              "answer": "employ the gardener",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "homeowner",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the homeowner?",
              "answer": "the gardener",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "homeowner",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "homeowner",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the homeowner do?",
              "answer": "scared the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "homeowner",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the homeowner's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "homeowner",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the homeowner's involvement?",
              "answer": "the gardener scared the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "homeowner",
              "is_middle_entity": false
            }
          ],
          "beetle": [
            {
              "question": "What did the beetle do?",
              "answer": "crawl",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "What chased the beetle?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "crawled",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the beetle's action?",
              "answer": "the homeowner employing the gardener which led to the gardener scaring the cat which led to the cat catching the bird which led to the bird chasing the beetle",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the beetle's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "beetle",
              "is_middle_entity": false
            }
          ],
          "gardener": [
            {
              "question": "What did the gardener do?",
              "answer": "scare the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "gardener",
              "is_middle_entity": false
            },
            {
              "question": "Who employed the gardener?",
              "answer": "the homeowner",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "gardener",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "gardener",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was employed do?",
              "answer": "scared the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "gardener",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the gardener's action?",
              "answer": "the homeowner employing the gardener",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "gardener",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the gardener's involvement?",
              "answer": "the cat caught the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "gardener",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "chase the beetle",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What caught the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "chased the beetle",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the homeowner employing the gardener which led to the gardener scaring the cat which led to the cat catching the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the beetle crawled",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "catch the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "Who scared the cat?",
              "answer": "the gardener",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "caught the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the homeowner employing the gardener which led to the gardener scaring the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird chased the beetle",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 30
      },
      {
        "id": "complexity_4_sentence_30",
        "sentence": "The dog that the cat that the mouse that the cheese that the shopkeeper sold attracted ran from chased barked.",
        "structure": [
          {
            "subject": "dog",
            "action": "barked",
            "object": null
          },
          {
            "subject": "cat",
            "action": "chased",
            "object": "dog"
          },
          {
            "subject": "mouse",
            "action": "ran from",
            "object": "cat"
          },
          {
            "subject": "cheese",
            "action": "attracted",
            "object": "mouse"
          },
          {
            "subject": "shopkeeper",
            "action": "sold",
            "object": "cheese"
          }
        ],
        "middle_entity": "mouse",
        "all_entities": [
          "dog",
          "cat",
          "mouse",
          "cheese",
          "shopkeeper"
        ],
        "questions_by_entity": {
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "barked",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What chased the dog?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "barked",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the shopkeeper selling the cheese which led to the cheese attracting the mouse which led to the mouse running from the cat which led to the cat chasing the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "chased the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What ran from the cat?",
              "answer": "the mouse",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that ran from the cat do?",
              "answer": "ran from the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the shopkeeper selling the cheese which led to the cheese attracting the mouse which led to the mouse running from the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the dog barked",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "mouse": [
            {
              "question": "What did the mouse do?",
              "answer": "ran from the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mouse",
              "is_middle_entity": true
            },
            {
              "question": "What attracted the mouse?",
              "answer": "the cheese",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mouse",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mouse",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was attracted do?",
              "answer": "ran from the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mouse",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the mouse's action?",
              "answer": "the shopkeeper selling the cheese which led to the cheese attracting the mouse",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mouse",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the mouse's involvement?",
              "answer": "the cat chased the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mouse",
              "is_middle_entity": true
            }
          ],
          "cheese": [
            {
              "question": "What did the cheese do?",
              "answer": "attracted the mouse",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cheese",
              "is_middle_entity": false
            },
            {
              "question": "Who sold the cheese?",
              "answer": "the shopkeeper",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cheese",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cheese",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was sold do?",
              "answer": "attracted the mouse",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cheese",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cheese's action?",
              "answer": "the shopkeeper selling the cheese",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cheese",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cheese's involvement?",
              "answer": "the mouse ran from the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cheese",
              "is_middle_entity": false
            }
          ],
          "shopkeeper": [
            {
              "question": "What did the shopkeeper do?",
              "answer": "sold the cheese",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "shopkeeper",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the shopkeeper?",
              "answer": "the cheese",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "shopkeeper",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "5",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "shopkeeper",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the shopkeeper do?",
              "answer": "attracted the mouse",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "shopkeeper",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the shopkeeper's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "shopkeeper",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the shopkeeper's involvement?",
              "answer": "the cheese attracted the mouse",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "shopkeeper",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 30
      }
    ],
    "total_questions": 888,
    "entities_processed": 148,
    "middle_entities_flagged": 30
  },
  "complexity_5": {
    "sentences": [
      {
        "id": "complexity_5_sentence_1",
        "sentence": "The cat that the dog that the kid that the teacher that the principal that the superintendent reprimanded scolded corrected found chased hissed.",
        "structure": [
          {
            "subject": "cat",
            "action": "hissed",
            "object": null
          },
          {
            "subject": "dog",
            "action": "chased",
            "object": "cat"
          },
          {
            "subject": "kid",
            "action": "found",
            "object": "dog"
          },
          {
            "subject": "teacher",
            "action": "corrected",
            "object": "kid"
          },
          {
            "subject": "principal",
            "action": "scolded",
            "object": "teacher"
          },
          {
            "subject": "superintendent",
            "action": "reprimanded",
            "object": "principal"
          }
        ],
        "middle_entity": "kid",
        "all_entities": [
          "kid",
          "dog",
          "principal",
          "teacher",
          "superintendent",
          "cat"
        ],
        "questions_by_entity": {
          "kid": [
            {
              "question": "What did the kid do?",
              "answer": "find the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "kid",
              "is_middle_entity": true
            },
            {
              "question": "Who corrected the kid?",
              "answer": "the teacher",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "kid",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "kid",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was corrected do?",
              "answer": "found the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "kid",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the kid's action?",
              "answer": "the superintendent reprimanding the principal which led to the principal scolding the teacher which led to the teacher correcting the kid",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "kid",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the kid's involvement?",
              "answer": "the dog chased the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "kid",
              "is_middle_entity": true
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "chase the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "Who found the dog?",
              "answer": "the kid",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was found do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the superintendent reprimanding the principal which led to the principal scolding the teacher which led to the teacher correcting the kid which led to the kid finding the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat hissed",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ],
          "principal": [
            {
              "question": "What did the principal do?",
              "answer": "scold the teacher",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "Who reprimanded the principal?",
              "answer": "the superintendent",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was reprimanded do?",
              "answer": "scolded the teacher",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the principal's action?",
              "answer": "the superintendent reprimanding the principal",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the principal's involvement?",
              "answer": "the teacher corrected the kid",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "principal",
              "is_middle_entity": false
            }
          ],
          "teacher": [
            {
              "question": "What did the teacher do?",
              "answer": "correct the kid",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "Who scolded the teacher?",
              "answer": "the principal",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was scolded do?",
              "answer": "corrected the kid",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the teacher's action?",
              "answer": "the superintendent reprimanding the principal which led to the principal scolding the teacher",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the teacher's involvement?",
              "answer": "the kid found the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "teacher",
              "is_middle_entity": false
            }
          ],
          "superintendent": [
            {
              "question": "What did the superintendent do?",
              "answer": "reprimand the principal",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "superintendent",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the superintendent?",
              "answer": "the principal",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "superintendent",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "superintendent",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the superintendent do?",
              "answer": "scolded the teacher",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "superintendent",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the superintendent's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "superintendent",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the superintendent's involvement?",
              "answer": "the principal scolded the teacher",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "superintendent",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "hiss",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What chased the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "hissed",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the superintendent reprimanding the principal which led to the principal scolding the teacher which led to the teacher correcting the kid which led to the kid finding the dog which led to the dog chasing the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_2",
        "sentence": "The mouse that the snake that the eagle that the hunter that the park ranger that the conservationist rescued arrested spotted saw swallowed squeaked.",
        "structure": [
          {
            "subject": "mouse",
            "action": "squeaked",
            "object": null
          },
          {
            "subject": "snake",
            "action": "swallowed",
            "object": "mouse"
          },
          {
            "subject": "eagle",
            "action": "saw",
            "object": "snake"
          },
          {
            "subject": "hunter",
            "action": "spotted",
            "object": "eagle"
          },
          {
            "subject": "park ranger",
            "action": "arrested",
            "object": "hunter"
          },
          {
            "subject": "conservationist",
            "action": "rescued",
            "object": "park ranger"
          }
        ],
        "middle_entity": "eagle",
        "all_entities": [
          "conservationist",
          "mouse",
          "park ranger",
          "eagle",
          "hunter",
          "snake"
        ],
        "questions_by_entity": {
          "conservationist": [
            {
              "question": "What did the conservationist do?",
              "answer": "rescue the park ranger",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "conservationist",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the conservationist?",
              "answer": "the park ranger",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "conservationist",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "conservationist",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the conservationist do?",
              "answer": "arrested the hunter",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "conservationist",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the conservationist's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "conservationist",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the conservationist's involvement?",
              "answer": "the park ranger arrested the hunter",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "conservationist",
              "is_middle_entity": false
            }
          ],
          "mouse": [
            {
              "question": "What did the mouse do?",
              "answer": "squeak",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What swallowed the mouse?",
              "answer": "the snake",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was swallowed do?",
              "answer": "squeaked",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mouse's action?",
              "answer": "the conservationist rescuing the park ranger which led to the park ranger arresting the hunter which led to the hunter spotting the eagle which led to the eagle seeing the snake which led to the snake swallowing the mouse",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mouse's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mouse",
              "is_middle_entity": false
            }
          ],
          "park ranger": [
            {
              "question": "What did the park ranger do?",
              "answer": "arrest the hunter",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "Who rescued the park ranger?",
              "answer": "the conservationist",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was rescued do?",
              "answer": "arrested the hunter",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the park ranger's action?",
              "answer": "the conservationist rescuing the park ranger",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the park ranger's involvement?",
              "answer": "the hunter spotted the eagle",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "park ranger",
              "is_middle_entity": false
            }
          ],
          "eagle": [
            {
              "question": "What did the eagle do?",
              "answer": "see the snake",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "eagle",
              "is_middle_entity": true
            },
            {
              "question": "Who spotted the eagle?",
              "answer": "the hunter",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "eagle",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "eagle",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was spotted do?",
              "answer": "saw the snake",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "eagle",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the eagle's action?",
              "answer": "the conservationist rescuing the park ranger which led to the park ranger arresting the hunter which led to the hunter spotting the eagle",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "eagle",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the eagle's involvement?",
              "answer": "the snake swallowed the mouse",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "eagle",
              "is_middle_entity": true
            }
          ],
          "hunter": [
            {
              "question": "What did the hunter do?",
              "answer": "spot the eagle",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "Who arrested the hunter?",
              "answer": "the park ranger",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was arrested do?",
              "answer": "spotted the eagle",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the hunter's action?",
              "answer": "the conservationist rescuing the park ranger which led to the park ranger arresting the hunter",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the hunter's involvement?",
              "answer": "the eagle saw the snake",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            }
          ],
          "snake": [
            {
              "question": "What did the snake do?",
              "answer": "swallow the mouse",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What saw the snake?",
              "answer": "the eagle",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "swallowed the mouse",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the snake's action?",
              "answer": "the conservationist rescuing the park ranger which led to the park ranger arresting the hunter which led to the hunter spotting the eagle which led to the eagle seeing the snake",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the snake's involvement?",
              "answer": "the mouse squeaked",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_3",
        "sentence": "The chicken that the fox that the hound that the farmer that the veterinarian that the animal rights activist found knew saved noticed hunted clucked.",
        "structure": [
          {
            "subject": "chicken",
            "action": "clucked",
            "object": null
          },
          {
            "subject": "fox",
            "action": "hunted",
            "object": "chicken"
          },
          {
            "subject": "hound",
            "action": "noticed",
            "object": "fox"
          },
          {
            "subject": "farmer",
            "action": "saved",
            "object": "hound"
          },
          {
            "subject": "veterinarian",
            "action": "knew",
            "object": "farmer"
          },
          {
            "subject": "animal rights activist",
            "action": "found",
            "object": "veterinarian"
          }
        ],
        "middle_entity": "hound",
        "all_entities": [
          "hound",
          "farmer",
          "fox",
          "chicken",
          "animal rights activist",
          "veterinarian"
        ],
        "questions_by_entity": {
          "hound": [
            {
              "question": "What did the hound do?",
              "answer": "notice the fox",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "hound",
              "is_middle_entity": true
            },
            {
              "question": "Who saved the hound?",
              "answer": "the farmer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "hound",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "hound",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was saved do?",
              "answer": "noticed the fox",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "hound",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the hound's action?",
              "answer": "the animal rights activist finding the veterinarian which led to the veterinarian knowing the farmer which led to the farmer saving the hound",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "hound",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the hound's involvement?",
              "answer": "the fox hunted the chicken",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "hound",
              "is_middle_entity": true
            }
          ],
          "farmer": [
            {
              "question": "What did the farmer do?",
              "answer": "save the hound",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "Who knew the farmer?",
              "answer": "the veterinarian",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was known do?",
              "answer": "saved the hound",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the farmer's action?",
              "answer": "the animal rights activist finding the veterinarian which led to the veterinarian knowing the farmer",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the farmer's involvement?",
              "answer": "the hound noticed the fox",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "farmer",
              "is_middle_entity": false
            }
          ],
          "fox": [
            {
              "question": "What did the fox do?",
              "answer": "hunt the chicken",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What noticed the fox?",
              "answer": "the hound",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was noticed do?",
              "answer": "hunted the chicken",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the fox's action?",
              "answer": "the animal rights activist finding the veterinarian which led to the veterinarian knowing the farmer which led to the farmer saving the hound which led to the hound noticing the fox",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the fox's involvement?",
              "answer": "the chicken clucked",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": false
            }
          ],
          "chicken": [
            {
              "question": "What did the chicken do?",
              "answer": "cluck",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "What hunted the chicken?",
              "answer": "the fox",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was hunted do?",
              "answer": "clucked",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the chicken's action?",
              "answer": "the animal rights activist finding the veterinarian which led to the veterinarian knowing the farmer which led to the farmer saving the hound which led to the hound noticing the fox which led to the fox hunting the chicken",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the chicken's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "chicken",
              "is_middle_entity": false
            }
          ],
          "animal rights activist": [
            {
              "question": "What did the animal rights activist do?",
              "answer": "find the veterinarian",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "animal rights activist",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the animal rights activist?",
              "answer": "the veterinarian",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "animal rights activist",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "animal rights activist",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the animal rights activist do?",
              "answer": "knew the farmer",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "animal rights activist",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the animal rights activist's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "animal rights activist",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the animal rights activist's involvement?",
              "answer": "the veterinarian knew the farmer",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "animal rights activist",
              "is_middle_entity": false
            }
          ],
          "veterinarian": [
            {
              "question": "What did the veterinarian do?",
              "answer": "know the farmer",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "veterinarian",
              "is_middle_entity": false
            },
            {
              "question": "Who found the veterinarian?",
              "answer": "the animal rights activist",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "veterinarian",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "veterinarian",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was found do?",
              "answer": "knew the farmer",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "veterinarian",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the veterinarian's action?",
              "answer": "the animal rights activist finding the veterinarian",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "veterinarian",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the veterinarian's involvement?",
              "answer": "the farmer saved the hound",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "veterinarian",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_4",
        "sentence": "The spider that the frog that the snake that the hawk that the falconer that the wildlife photographer snapped released saw followed ate died.",
        "structure": [
          {
            "subject": "spider",
            "action": "died",
            "object": null
          },
          {
            "subject": "frog",
            "action": "ate",
            "object": "spider"
          },
          {
            "subject": "snake",
            "action": "followed",
            "object": "frog"
          },
          {
            "subject": "hawk",
            "action": "saw",
            "object": "snake"
          },
          {
            "subject": "falconer",
            "action": "released",
            "object": "hawk"
          },
          {
            "subject": "photographer",
            "action": "snapped",
            "object": "falconer"
          }
        ],
        "middle_entity": "snake",
        "all_entities": [
          "frog",
          "spider",
          "falconer",
          "photographer",
          "snake",
          "hawk"
        ],
        "questions_by_entity": {
          "frog": [
            {
              "question": "What did the frog do?",
              "answer": "eat the spider",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "What followed the frog?",
              "answer": "the snake",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was followed do?",
              "answer": "ate the spider",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the frog's action?",
              "answer": "the photographer snapping the falconer which led to the falconer releasing the hawk which led to the hawk seeing the snake which led to the snake following the frog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the frog's involvement?",
              "answer": "the spider died",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "frog",
              "is_middle_entity": false
            }
          ],
          "spider": [
            {
              "question": "What did the spider do?",
              "answer": "die",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What ate the spider?",
              "answer": "the frog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was eaten do?",
              "answer": "died",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the spider's action?",
              "answer": "the photographer snapping the falconer which led to the falconer releasing the hawk which led to the hawk seeing the snake which led to the snake following the frog which led to the frog eating the spider",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the spider's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            }
          ],
          "falconer": [
            {
              "question": "What did the falconer do?",
              "answer": "release the hawk",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "falconer",
              "is_middle_entity": false
            },
            {
              "question": "Who snapped the falconer?",
              "answer": "the photographer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "falconer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "falconer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was snapped do?",
              "answer": "released the hawk",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "falconer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the falconer's action?",
              "answer": "the photographer snapping the falconer",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "falconer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the falconer's involvement?",
              "answer": "the hawk saw the snake",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "falconer",
              "is_middle_entity": false
            }
          ],
          "photographer": [
            {
              "question": "What did the photographer do?",
              "answer": "snap the falconer",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "photographer",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the photographer?",
              "answer": "the falconer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "photographer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "photographer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the photographer do?",
              "answer": "released the hawk",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "photographer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the photographer's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "photographer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the photographer's involvement?",
              "answer": "the falconer released the hawk",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "photographer",
              "is_middle_entity": false
            }
          ],
          "snake": [
            {
              "question": "What did the snake do?",
              "answer": "follow the frog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What saw the snake?",
              "answer": "the hawk",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "followed the frog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the snake's action?",
              "answer": "the photographer snapping the falconer which led to the falconer releasing the hawk which led to the hawk seeing the snake",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the snake's involvement?",
              "answer": "the frog ate the spider",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": true
            }
          ],
          "hawk": [
            {
              "question": "What did the hawk do?",
              "answer": "see the snake",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "hawk",
              "is_middle_entity": false
            },
            {
              "question": "Who released the hawk?",
              "answer": "the falconer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "hawk",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "hawk",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was released do?",
              "answer": "saw the snake",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "hawk",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the hawk's action?",
              "answer": "the photographer snapping the falconer which led to the falconer releasing the hawk",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "hawk",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the hawk's involvement?",
              "answer": "the snake followed the frog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "hawk",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_5",
        "sentence": "The fly that the spider that the bird that the cat that the dog that the postman scared chased saw followed caught died.",
        "structure": [
          {
            "subject": "fly",
            "action": "died",
            "object": null
          },
          {
            "subject": "spider",
            "action": "caught",
            "object": "fly"
          },
          {
            "subject": "bird",
            "action": "followed",
            "object": "spider"
          },
          {
            "subject": "cat",
            "action": "saw",
            "object": "bird"
          },
          {
            "subject": "dog",
            "action": "chased",
            "object": "cat"
          },
          {
            "subject": "postman",
            "action": "scared",
            "object": "dog"
          }
        ],
        "middle_entity": "bird",
        "all_entities": [
          "dog",
          "spider",
          "bird",
          "cat",
          "postman",
          "fly"
        ],
        "questions_by_entity": {
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "chase the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "Who scared the dog?",
              "answer": "the postman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the postman scaring the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat saw the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ],
          "spider": [
            {
              "question": "What did the spider do?",
              "answer": "catch the fly",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What followed the spider?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was followed do?",
              "answer": "caught the fly",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the spider's action?",
              "answer": "the postman scaring the dog which led to the dog chasing the cat which led to the cat seeing the bird which led to the bird following the spider",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the spider's involvement?",
              "answer": "the fly died",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "follow the spider",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What saw the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "followed the spider",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the postman scaring the dog which led to the dog chasing the cat which led to the cat seeing the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the spider caught the fly",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": true
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "see the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What chased the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "saw the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the postman scaring the dog which led to the dog chasing the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird followed the spider",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "postman": [
            {
              "question": "What did the postman do?",
              "answer": "scare the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "postman",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the postman?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "postman",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "postman",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the postman do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "postman",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the postman's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "postman",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the postman's involvement?",
              "answer": "the dog chased the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "postman",
              "is_middle_entity": false
            }
          ],
          "fly": [
            {
              "question": "What did the fly do?",
              "answer": "die",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What caught the fly?",
              "answer": "the spider",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "died",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the fly's action?",
              "answer": "the postman scaring the dog which led to the dog chasing the cat which led to the cat seeing the bird which led to the bird following the spider which led to the spider catching the fly",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the fly's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fly",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_6",
        "sentence": "The goldfish that the cat that the toddler that the babysitter that the mother that the grandmother called comforted supervised chased saw swam.",
        "structure": [
          {
            "subject": "goldfish",
            "action": "swam",
            "object": null
          },
          {
            "subject": "cat",
            "action": "saw",
            "object": "goldfish"
          },
          {
            "subject": "toddler",
            "action": "chased",
            "object": "cat"
          },
          {
            "subject": "babysitter",
            "action": "supervised",
            "object": "toddler"
          },
          {
            "subject": "mother",
            "action": "comforted",
            "object": "babysitter"
          },
          {
            "subject": "grandmother",
            "action": "called",
            "object": "mother"
          }
        ],
        "middle_entity": "toddler",
        "all_entities": [
          "toddler",
          "mother",
          "cat",
          "goldfish",
          "babysitter",
          "grandmother"
        ],
        "questions_by_entity": {
          "toddler": [
            {
              "question": "What did the toddler do?",
              "answer": "chase the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "toddler",
              "is_middle_entity": true
            },
            {
              "question": "Who supervised the toddler?",
              "answer": "the babysitter",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "toddler",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "toddler",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was supervised do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "toddler",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the toddler's action?",
              "answer": "the mother comforting the babysitter which led to the babysitter supervising the toddler",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "toddler",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the toddler's involvement?",
              "answer": "the cat saw the goldfish",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "toddler",
              "is_middle_entity": true
            }
          ],
          "grandmother": [
            {
              "question": "What did the grandmother do?",
              "answer": "call the mother",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "toddler",
              "is_middle_entity": true
            },
            {
              "question": "Who was affected by the grandmother?",
              "answer": "the mother",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "toddler",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "toddler",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was affected by the grandmother do?",
              "answer": "comforted the babysitter",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "toddler",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the grandmother's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "toddler",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the toddler's involvement?",
              "answer": "the mother comforted the babysitter",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "toddler",
              "is_middle_entity": true
            }
          ],
          "mother": [
            {
              "question": "What did the mother do?",
              "answer": "comfort the babysitter",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the mother?",
              "answer": "the babysitter",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the mother do?",
              "answer": "supervised the toddler",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mother's action?",
              "answer": "the grandmother calling the mother",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mother's involvement?",
              "answer": "the babysitter supervised the toddler",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mother",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "see the goldfish",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "Who chased the cat?",
              "answer": "the toddler",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "saw the goldfish",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the grandmother calling the mother which led to the mother comforting the babysitter which led to the babysitter supervising the toddler which led to the toddler chasing the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the goldfish swam",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "goldfish": [
            {
              "question": "What did the goldfish do?",
              "answer": "swim",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "What saw the goldfish?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "swam",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the goldfish's action?",
              "answer": "the grandmother calling the mother which led to the mother comforting the babysitter which led to the babysitter supervising the toddler which led to the toddler chasing the cat which led to the cat seeing the goldfish",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the goldfish's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "goldfish",
              "is_middle_entity": false
            }
          ],
          "babysitter": [
            {
              "question": "What did the babysitter do?",
              "answer": "supervise the toddler",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "babysitter",
              "is_middle_entity": false
            },
            {
              "question": "Who comforted the babysitter?",
              "answer": "the mother",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "babysitter",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "babysitter",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was comforted do?",
              "answer": "supervised the toddler",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "babysitter",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the babysitter's action?",
              "answer": "the mother comforting the babysitter",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "babysitter",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the babysitter's involvement?",
              "answer": "the toddler chased the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "babysitter",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_7",
        "sentence": "The rabbit that the fox that the wolf that the bear that the hunter that the game warden arrested tracked stalked chased saw hopped.",
        "structure": [
          {
            "subject": "rabbit",
            "action": "hopped",
            "object": null
          },
          {
            "subject": "fox",
            "action": "saw",
            "object": "rabbit"
          },
          {
            "subject": "wolf",
            "action": "chased",
            "object": "fox"
          },
          {
            "subject": "bear",
            "action": "stalked",
            "object": "wolf"
          },
          {
            "subject": "hunter",
            "action": "tracked",
            "object": "bear"
          },
          {
            "subject": "game warden",
            "action": "arrested",
            "object": "hunter"
          }
        ],
        "middle_entity": "wolf",
        "all_entities": [
          "rabbit",
          "fox",
          "bear",
          "game warden",
          "hunter",
          "wolf"
        ],
        "questions_by_entity": {
          "rabbit": [
            {
              "question": "What did the rabbit do?",
              "answer": "hop",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What saw the rabbit?",
              "answer": "the fox",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "hopped",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the rabbit's action?",
              "answer": "the game warden arresting the hunter which led to the hunter tracking the bear which led to the bear stalking the wolf which led to the wolf chasing the fox which led to the fox seeing the rabbit",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the rabbit's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "rabbit",
              "is_middle_entity": false
            }
          ],
          "fox": [
            {
              "question": "What did the fox do?",
              "answer": "see the rabbit",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What chased the fox?",
              "answer": "the wolf",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "saw the rabbit",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the fox's action?",
              "answer": "the game warden arresting the hunter which led to the hunter tracking the bear which led to the bear stalking the wolf which led to the wolf chasing the fox",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the fox's involvement?",
              "answer": "the rabbit hopped",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": false
            }
          ],
          "bear": [
            {
              "question": "What did the bear do?",
              "answer": "stalk the wolf",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "Who tracked the bear?",
              "answer": "the hunter",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was tracked do?",
              "answer": "stalked the wolf",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bear's action?",
              "answer": "the game warden arresting the hunter which led to the hunter tracking the bear",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bear's involvement?",
              "answer": "the wolf chased the fox",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": false
            }
          ],
          "game warden": [
            {
              "question": "What did the game warden do?",
              "answer": "arrest the hunter",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "game warden",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the game warden?",
              "answer": "the hunter",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "game warden",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "game warden",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the game warden do?",
              "answer": "tracked the bear",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "game warden",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the game warden's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "game warden",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the game warden's involvement?",
              "answer": "the hunter tracked the bear",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "game warden",
              "is_middle_entity": false
            }
          ],
          "hunter": [
            {
              "question": "What did the hunter do?",
              "answer": "track the bear",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "Who arrested the hunter?",
              "answer": "the game warden",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was arrested do?",
              "answer": "tracked the bear",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the hunter's action?",
              "answer": "the game warden arresting the hunter",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the hunter's involvement?",
              "answer": "the bear stalked the wolf",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            }
          ],
          "wolf": [
            {
              "question": "What did the wolf do?",
              "answer": "chase the fox",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What stalked the wolf?",
              "answer": "the bear",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was stalked do?",
              "answer": "chased the fox",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the wolf's action?",
              "answer": "the game warden arresting the hunter which led to the hunter tracking the bear which led to the bear stalking the wolf",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the wolf's involvement?",
              "answer": "the fox saw the rabbit",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_8",
        "sentence": "The sheep that the dog that the wolf that the hunter that the park ranger that the conservationist informed apprehended scared chased saw grazed.",
        "structure": [
          {
            "subject": "sheep",
            "action": "grazed",
            "object": null
          },
          {
            "subject": "dog",
            "action": "saw",
            "object": "sheep"
          },
          {
            "subject": "wolf",
            "action": "chased",
            "object": "dog"
          },
          {
            "subject": "hunter",
            "action": "scared",
            "object": "wolf"
          },
          {
            "subject": "park ranger",
            "action": "apprehended",
            "object": "hunter"
          },
          {
            "subject": "conservationist",
            "action": "informed",
            "object": "park ranger"
          }
        ],
        "middle_entity": "wolf",
        "all_entities": [
          "dog",
          "conservationist",
          "park ranger",
          "sheep",
          "hunter",
          "wolf"
        ],
        "questions_by_entity": {
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "see the sheep",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What chased the dog?",
              "answer": "the wolf",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "saw the sheep",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the conservationist informing the park ranger which led to the park ranger apprehending the hunter which led to the hunter scaring the wolf which led to the wolf chasing the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the sheep grazed",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ],
          "conservationist": [
            {
              "question": "What did the conservationist do?",
              "answer": "inform the park ranger",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "conservationist",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the conservationist?",
              "answer": "the park ranger",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "conservationist",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "conservationist",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the conservationist do?",
              "answer": "apprehended the hunter",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "conservationist",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the conservationist's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "conservationist",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the conservationist's involvement?",
              "answer": "the park ranger apprehended the hunter",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "conservationist",
              "is_middle_entity": false
            }
          ],
          "park ranger": [
            {
              "question": "What did the park ranger do?",
              "answer": "apprehend the hunter",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "Who informed the park ranger?",
              "answer": "the conservationist",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was informed do?",
              "answer": "apprehended the hunter",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the park ranger's action?",
              "answer": "the conservationist informing the park ranger",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the park ranger's involvement?",
              "answer": "the hunter scared the wolf",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "park ranger",
              "is_middle_entity": false
            }
          ],
          "sheep": [
            {
              "question": "What did the sheep do?",
              "answer": "graze",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "sheep",
              "is_middle_entity": false
            },
            {
              "question": "What saw the sheep?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "sheep",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "sheep",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "grazed",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "sheep",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the sheep's action?",
              "answer": "the conservationist informing the park ranger which led to the park ranger apprehending the hunter which led to the hunter scaring the wolf which led to the wolf chasing the dog which led to the dog seeing the sheep",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "sheep",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the sheep's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "sheep",
              "is_middle_entity": false
            }
          ],
          "hunter": [
            {
              "question": "What did the hunter do?",
              "answer": "scare the wolf",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "Who apprehended the hunter?",
              "answer": "the park ranger",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was apprehended do?",
              "answer": "scared the wolf",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the hunter's action?",
              "answer": "the conservationist informing the park ranger which led to the park ranger apprehending the hunter",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the hunter's involvement?",
              "answer": "the wolf chased the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            }
          ],
          "wolf": [
            {
              "question": "What did the wolf do?",
              "answer": "chase the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "Who scared the wolf?",
              "answer": "the hunter",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scared do?",
              "answer": "chased the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the wolf's action?",
              "answer": "the conservationist informing the park ranger which led to the park ranger apprehending the hunter which led to the hunter scaring the wolf",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the wolf's involvement?",
              "answer": "the dog saw the sheep",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_9",
        "sentence": "The rat that the snake that the mongoose that the leopard that the zookeeper that the zoologist examined fed hunted chased swallowed died.",
        "structure": [
          {
            "subject": "rat",
            "action": "died",
            "object": null
          },
          {
            "subject": "snake",
            "action": "swallowed",
            "object": "rat"
          },
          {
            "subject": "mongoose",
            "action": "chased",
            "object": "snake"
          },
          {
            "subject": "leopard",
            "action": "hunted",
            "object": "mongoose"
          },
          {
            "subject": "zookeeper",
            "action": "fed",
            "object": "leopard"
          },
          {
            "subject": "zoologist",
            "action": "examined",
            "object": "zookeeper"
          }
        ],
        "middle_entity": "mongoose",
        "all_entities": [
          "leopard",
          "zoologist",
          "mongoose",
          "rat",
          "zookeeper",
          "snake"
        ],
        "questions_by_entity": {
          "leopard": [
            {
              "question": "What did the leopard do?",
              "answer": "hunt the mongoose",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "leopard",
              "is_middle_entity": false
            },
            {
              "question": "Who fed the leopard?",
              "answer": "the zookeeper",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "leopard",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "leopard",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was fed do?",
              "answer": "hunted the mongoose",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "leopard",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the leopard's action?",
              "answer": "the zoologist examining the zookeeper which led to the zookeeper feeding the leopard",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "leopard",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the leopard's involvement?",
              "answer": "the mongoose chased the snake",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "leopard",
              "is_middle_entity": false
            }
          ],
          "zoologist": [
            {
              "question": "What did the zoologist do?",
              "answer": "examine the zookeeper",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "zoologist",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the zoologist?",
              "answer": "the zookeeper",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "zoologist",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "zoologist",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the zoologist do?",
              "answer": "fed the leopard",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "zoologist",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the zoologist's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "zoologist",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the zoologist's involvement?",
              "answer": "the zookeeper fed the leopard",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "zoologist",
              "is_middle_entity": false
            }
          ],
          "mongoose": [
            {
              "question": "What did the mongoose do?",
              "answer": "chase the snake",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mongoose",
              "is_middle_entity": true
            },
            {
              "question": "What hunted the mongoose?",
              "answer": "the leopard",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mongoose",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mongoose",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was hunted do?",
              "answer": "chased the snake",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mongoose",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the mongoose's action?",
              "answer": "the zoologist examining the zookeeper which led to the zookeeper feeding the leopard which led to the leopard hunting the mongoose",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mongoose",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the mongoose's involvement?",
              "answer": "the snake swallowed the rat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mongoose",
              "is_middle_entity": true
            }
          ],
          "rat": [
            {
              "question": "What did the rat do?",
              "answer": "die",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "rat",
              "is_middle_entity": false
            },
            {
              "question": "What swallowed the rat?",
              "answer": "the snake",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "rat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "rat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was swallowed do?",
              "answer": "died",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "rat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the rat's action?",
              "answer": "the zoologist examining the zookeeper which led to the zookeeper feeding the leopard which led to the leopard hunting the mongoose which led to the mongoose chasing the snake which led to the snake swallowing the rat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "rat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the rat's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "rat",
              "is_middle_entity": false
            }
          ],
          "zookeeper": [
            {
              "question": "What did the zookeeper do?",
              "answer": "feed the leopard",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "Who examined the zookeeper?",
              "answer": "the zoologist",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was examined do?",
              "answer": "fed the leopard",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the zookeeper's action?",
              "answer": "the zoologist examining the zookeeper",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the zookeeper's involvement?",
              "answer": "the leopard hunted the mongoose",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "zookeeper",
              "is_middle_entity": false
            }
          ],
          "snake": [
            {
              "question": "What did the snake do?",
              "answer": "swallow the rat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What chased the snake?",
              "answer": "the mongoose",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "swallowed the rat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the snake's action?",
              "answer": "the zoologist examining the zookeeper which led to the zookeeper feeding the leopard which led to the leopard hunting the mongoose which led to the mongoose chasing the snake",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the snake's involvement?",
              "answer": "the rat died",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_10",
        "sentence": "The beetle that the bird that the cat that the dog that the child that the mother called chased followed saw ate died.",
        "structure": [
          {
            "subject": "beetle",
            "action": "died",
            "object": null
          },
          {
            "subject": "bird",
            "action": "ate",
            "object": "beetle"
          },
          {
            "subject": "cat",
            "action": "saw",
            "object": "bird"
          },
          {
            "subject": "dog",
            "action": "followed",
            "object": "cat"
          },
          {
            "subject": "child",
            "action": "chased",
            "object": "dog"
          },
          {
            "subject": "mother",
            "action": "called",
            "object": "child"
          }
        ],
        "middle_entity": "cat",
        "all_entities": [
          "dog",
          "mother",
          "child",
          "beetle",
          "bird",
          "cat"
        ],
        "questions_by_entity": {
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "follow the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "Who chased the dog?",
              "answer": "the child",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "followed the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the mother calling the child which led to the child chasing the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat saw the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ],
          "mother": [
            {
              "question": "What did the mother do?",
              "answer": "call the child",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the mother?",
              "answer": "the child",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the mother do?",
              "answer": "chased the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mother's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mother's involvement?",
              "answer": "the child chased the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mother",
              "is_middle_entity": false
            }
          ],
          "child": [
            {
              "question": "What did the child do?",
              "answer": "chase the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "Who called the child?",
              "answer": "the mother",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was called do?",
              "answer": "chased the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the child's action?",
              "answer": "the mother calling the child",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the child's involvement?",
              "answer": "the dog followed the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": false
            }
          ],
          "beetle": [
            {
              "question": "What did the beetle do?",
              "answer": "die",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "What ate the beetle?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was eaten do?",
              "answer": "died",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the beetle's action?",
              "answer": "the mother calling the child which led to the child chasing the dog which led to the dog following the cat which led to the cat seeing the bird which led to the bird eating the beetle",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the beetle's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "beetle",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "eat the beetle",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What saw the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "ate the beetle",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the mother calling the child which led to the child chasing the dog which led to the dog following the cat which led to the cat seeing the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the beetle died",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "see the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What followed the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was followed do?",
              "answer": "saw the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the mother calling the child which led to the child chasing the dog which led to the dog following the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird ate the beetle",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_11",
        "sentence": "The squirrel that the cat that the dog that the child that the teacher that the principal reprimanded scolded trained chased caught escaped.",
        "structure": [
          {
            "subject": "squirrel",
            "action": "escaped",
            "object": null
          },
          {
            "subject": "cat",
            "action": "caught",
            "object": "squirrel"
          },
          {
            "subject": "dog",
            "action": "chased",
            "object": "cat"
          },
          {
            "subject": "child",
            "action": "trained",
            "object": "dog"
          },
          {
            "subject": "teacher",
            "action": "scolded",
            "object": "child"
          },
          {
            "subject": "principal",
            "action": "reprimanded",
            "object": "teacher"
          }
        ],
        "middle_entity": "dog",
        "all_entities": [
          "principal",
          "dog",
          "squirrel",
          "teacher",
          "child",
          "cat"
        ],
        "questions_by_entity": {
          "principal": [
            {
              "question": "What did the principal do?",
              "answer": "reprimand the teacher",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the principal?",
              "answer": "the teacher",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the principal do?",
              "answer": "scolded the child",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the principal's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the principal's involvement?",
              "answer": "the teacher scolded the child",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "principal",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "chase the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "Who trained the dog?",
              "answer": "the child",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was trained do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the principal reprimanding the teacher which led to the teacher scolding the child which led to the child training the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat caught the squirrel",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            }
          ],
          "squirrel": [
            {
              "question": "What did the squirrel do?",
              "answer": "escape",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "What caught the squirrel?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "escaped",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the squirrel's action?",
              "answer": "the principal reprimanding the teacher which led to the teacher scolding the child which led to the child training the dog which led to the dog chasing the cat which led to the cat catching the squirrel",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the squirrel's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "squirrel",
              "is_middle_entity": false
            }
          ],
          "teacher": [
            {
              "question": "What did the teacher do?",
              "answer": "scold the child",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "Who reprimanded the teacher?",
              "answer": "the principal",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was reprimanded do?",
              "answer": "scolded the child",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the teacher's action?",
              "answer": "the principal reprimanding the teacher",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the teacher's involvement?",
              "answer": "the child trained the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "teacher",
              "is_middle_entity": false
            }
          ],
          "child": [
            {
              "question": "What did the child do?",
              "answer": "train the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "Who scolded the child?",
              "answer": "the teacher",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was scolded do?",
              "answer": "trained the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the child's action?",
              "answer": "the principal reprimanding the teacher which led to the teacher scolding the child",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the child's involvement?",
              "answer": "the dog chased the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "catch the squirrel",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What chased the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "caught the squirrel",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the principal reprimanding the teacher which led to the teacher scolding the child which led to the child training the dog which led to the dog chasing the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the squirrel escaped",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_12",
        "sentence": "The centipede that the bird that the snake that the eagle that the zookeeper that the biologist monitored observed followed spotted ate died.",
        "structure": [
          {
            "subject": "centipede",
            "action": "died",
            "object": null
          },
          {
            "subject": "bird",
            "action": "ate",
            "object": "centipede"
          },
          {
            "subject": "snake",
            "action": "spotted",
            "object": "bird"
          },
          {
            "subject": "eagle",
            "action": "followed",
            "object": "snake"
          },
          {
            "subject": "zookeeper",
            "action": "observed",
            "object": "eagle"
          },
          {
            "subject": "biologist",
            "action": "monitored",
            "object": "zookeeper"
          }
        ],
        "middle_entity": "snake",
        "all_entities": [
          "zookeeper",
          "centipede",
          "eagle",
          "bird",
          "snake",
          "biologist"
        ],
        "questions_by_entity": {
          "zookeeper": [
            {
              "question": "What did the zookeeper do?",
              "answer": "observe the eagle",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "Who monitored the zookeeper?",
              "answer": "the biologist",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was monitored do?",
              "answer": "observed the eagle",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the zookeeper's action?",
              "answer": "the biologist monitoring the zookeeper",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the zookeeper's involvement?",
              "answer": "the eagle followed the snake",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "zookeeper",
              "is_middle_entity": false
            }
          ],
          "centipede": [
            {
              "question": "What did the centipede do?",
              "answer": "die",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "centipede",
              "is_middle_entity": false
            },
            {
              "question": "What ate the centipede?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "centipede",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "centipede",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was eaten do?",
              "answer": "died",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "centipede",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the centipede's action?",
              "answer": "the biologist monitoring the zookeeper which led to the zookeeper observing the eagle which led to the eagle following the snake which led to the snake spotting the bird which led to the bird eating the centipede",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "centipede",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the centipede's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "centipede",
              "is_middle_entity": false
            }
          ],
          "eagle": [
            {
              "question": "What did the eagle do?",
              "answer": "follow the snake",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "Who observed the eagle?",
              "answer": "the zookeeper",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was observed do?",
              "answer": "followed the snake",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the eagle's action?",
              "answer": "the biologist monitoring the zookeeper which led to the zookeeper observing the eagle",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the eagle's involvement?",
              "answer": "the snake spotted the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "eagle",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "eat the centipede",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What spotted the bird?",
              "answer": "the snake",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was spotted do?",
              "answer": "ate the centipede",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the biologist monitoring the zookeeper which led to the zookeeper observing the eagle which led to the eagle following the snake which led to the snake spotting the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the centipede died",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "snake": [
            {
              "question": "What did the snake do?",
              "answer": "spot the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What followed the snake?",
              "answer": "the eagle",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was followed do?",
              "answer": "spotted the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the snake's action?",
              "answer": "the biologist monitoring the zookeeper which led to the zookeeper observing the eagle which led to the eagle following the snake",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the snake's involvement?",
              "answer": "the bird ate the centipede",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": true
            }
          ],
          "biologist": [
            {
              "question": "What did the biologist do?",
              "answer": "monitor the zookeeper",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "biologist",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the biologist?",
              "answer": "the zookeeper",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "biologist",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "biologist",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the biologist do?",
              "answer": "observed the eagle",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "biologist",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the biologist's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "biologist",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the biologist's involvement?",
              "answer": "the zookeeper observed the eagle",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "biologist",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_13",
        "sentence": "The butterfly that the bird that the cat that the dog that the mailman that the police officer warned saw barked chased ate died.",
        "structure": [
          {
            "subject": "butterfly",
            "action": "died",
            "object": null
          },
          {
            "subject": "bird",
            "action": "ate",
            "object": "butterfly"
          },
          {
            "subject": "cat",
            "action": "chased",
            "object": "bird"
          },
          {
            "subject": "dog",
            "action": "barked",
            "object": "cat"
          },
          {
            "subject": "mailman",
            "action": "saw",
            "object": "dog"
          },
          {
            "subject": "police officer",
            "action": "warned",
            "object": "mailman"
          }
        ],
        "middle_entity": "cat",
        "all_entities": [
          "mailman",
          "dog",
          "butterfly",
          "police officer",
          "bird",
          "cat"
        ],
        "questions_by_entity": {
          "mailman": [
            {
              "question": "What did the mailman do?",
              "answer": "see the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "Who warned the mailman?",
              "answer": "the police officer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was warned do?",
              "answer": "saw the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mailman's action?",
              "answer": "the police officer warning the mailman",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mailman's involvement?",
              "answer": "the dog barked the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mailman",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "bark the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "Who saw the dog?",
              "answer": "the mailman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "barked the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the police officer warning the mailman which led to the mailman seeing the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat chased the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ],
          "butterfly": [
            {
              "question": "What did the butterfly do?",
              "answer": "die",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "What ate the butterfly?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was eaten do?",
              "answer": "died",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the butterfly's action?",
              "answer": "the police officer warning the mailman which led to the mailman seeing the dog which led to the dog barking the cat which led to the cat chasing the bird which led to the bird eating the butterfly",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the butterfly's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "butterfly",
              "is_middle_entity": false
            }
          ],
          "police officer": [
            {
              "question": "What did the police officer do?",
              "answer": "warn the mailman",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "police officer",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the police officer?",
              "answer": "the mailman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "police officer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "police officer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the police officer do?",
              "answer": "saw the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "police officer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the police officer's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "police officer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the police officer's involvement?",
              "answer": "the mailman saw the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "police officer",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "eat the butterfly",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What chased the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "ate the butterfly",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the police officer warning the mailman which led to the mailman seeing the dog which led to the dog barking the cat which led to the cat chasing the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the butterfly died",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "chase the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What barked the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was barked do?",
              "answer": "chased the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the police officer warning the mailman which led to the mailman seeing the dog which led to the dog barking the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird ate the butterfly",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_14",
        "sentence": "The cricket that the frog that the snake that the hawk that the falconer that the wildlife photographer captured released spotted followed swallowed chirped.",
        "structure": [
          {
            "subject": "cricket",
            "action": "chirped",
            "object": null
          },
          {
            "subject": "frog",
            "action": "swallowed",
            "object": "cricket"
          },
          {
            "subject": "snake",
            "action": "followed",
            "object": "frog"
          },
          {
            "subject": "hawk",
            "action": "spotted",
            "object": "snake"
          },
          {
            "subject": "falconer",
            "action": "released",
            "object": "hawk"
          },
          {
            "subject": "photographer",
            "action": "captured",
            "object": "falconer"
          }
        ],
        "middle_entity": "snake",
        "all_entities": [
          "frog",
          "falconer",
          "photographer",
          "snake",
          "hawk",
          "cricket"
        ],
        "questions_by_entity": {
          "frog": [
            {
              "question": "What did the frog do?",
              "answer": "swallow the cricket",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "What followed the frog?",
              "answer": "the snake",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was followed do?",
              "answer": "swallowed the cricket",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the frog's action?",
              "answer": "the photographer capturing the falconer which led to the falconer releasing the hawk which led to the hawk spotting the snake which led to the snake following the frog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the frog's involvement?",
              "answer": "the cricket chirped",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "frog",
              "is_middle_entity": false
            }
          ],
          "falconer": [
            {
              "question": "What did the falconer do?",
              "answer": "release the hawk",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "falconer",
              "is_middle_entity": false
            },
            {
              "question": "Who captured the falconer?",
              "answer": "the photographer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "falconer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "falconer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was captured do?",
              "answer": "released the hawk",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "falconer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the falconer's action?",
              "answer": "the photographer capturing the falconer",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "falconer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the falconer's involvement?",
              "answer": "the hawk spotted the snake",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "falconer",
              "is_middle_entity": false
            }
          ],
          "photographer": [
            {
              "question": "What did the photographer do?",
              "answer": "capture the falconer",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "photographer",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the photographer?",
              "answer": "the falconer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "photographer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "photographer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the photographer do?",
              "answer": "released the hawk",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "photographer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the photographer's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "photographer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the photographer's involvement?",
              "answer": "the falconer released the hawk",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "photographer",
              "is_middle_entity": false
            }
          ],
          "snake": [
            {
              "question": "What did the snake do?",
              "answer": "follow the frog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What spotted the snake?",
              "answer": "the hawk",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was spotted do?",
              "answer": "followed the frog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the snake's action?",
              "answer": "the photographer capturing the falconer which led to the falconer releasing the hawk which led to the hawk spotting the snake",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the snake's involvement?",
              "answer": "the frog swallowed the cricket",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": true
            }
          ],
          "hawk": [
            {
              "question": "What did the hawk do?",
              "answer": "spot the snake",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "hawk",
              "is_middle_entity": false
            },
            {
              "question": "Who released the hawk?",
              "answer": "the falconer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "hawk",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "hawk",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was released do?",
              "answer": "spotted the snake",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "hawk",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the hawk's action?",
              "answer": "the photographer capturing the falconer which led to the falconer releasing the hawk",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "hawk",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the hawk's involvement?",
              "answer": "the snake followed the frog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "hawk",
              "is_middle_entity": false
            }
          ],
          "cricket": [
            {
              "question": "What did the cricket do?",
              "answer": "chirp",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cricket",
              "is_middle_entity": false
            },
            {
              "question": "What swallowed the cricket?",
              "answer": "the frog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cricket",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cricket",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was swallowed do?",
              "answer": "chirped",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cricket",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cricket's action?",
              "answer": "the photographer capturing the falconer which led to the falconer releasing the hawk which led to the hawk spotting the snake which led to the snake following the frog which led to the frog swallowing the cricket",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cricket",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cricket's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cricket",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_15",
        "sentence": "The parrot that the cat that the dog that the boy that the father that the grandfather comforted scolded chased followed startled flew.",
        "structure": [
          {
            "subject": "parrot",
            "action": "flew",
            "object": null
          },
          {
            "subject": "cat",
            "action": "startled",
            "object": "parrot"
          },
          {
            "subject": "dog",
            "action": "followed",
            "object": "cat"
          },
          {
            "subject": "boy",
            "action": "chased",
            "object": "dog"
          },
          {
            "subject": "father",
            "action": "scolded",
            "object": "boy"
          },
          {
            "subject": "grandfather",
            "action": "comforted",
            "object": "father"
          }
        ],
        "middle_entity": "dog",
        "all_entities": [
          "parrot",
          "dog",
          "father",
          "grandfather",
          "cat",
          "boy"
        ],
        "questions_by_entity": {
          "parrot": [
            {
              "question": "What did the parrot do?",
              "answer": "fly",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "What startled the parrot?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "flew",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the parrot's action?",
              "answer": "the grandfather comforting the father which led to the father scolding the boy which led to the boy chasing the dog which led to the dog following the cat which led to the cat startling the parrot",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the parrot's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "parrot",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "follow the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "Who chased the dog?",
              "answer": "the boy",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "followed the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the grandfather comforting the father which led to the father scolding the boy which led to the boy chasing the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat startled the parrot",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            }
          ],
          "father": [
            {
              "question": "What did the father do?",
              "answer": "scold the boy",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "father",
              "is_middle_entity": false
            },
            {
              "question": "Who comforted the father?",
              "answer": "the grandfather",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "father",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "father",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was comforted do?",
              "answer": "scolded the boy",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "father",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the father's action?",
              "answer": "the grandfather comforting the father",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "father",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the father's involvement?",
              "answer": "the boy chased the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "father",
              "is_middle_entity": false
            }
          ],
          "grandfather": [
            {
              "question": "What did the grandfather do?",
              "answer": "comfort the father",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "grandfather",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the grandfather?",
              "answer": "the father",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "grandfather",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "grandfather",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the grandfather do?",
              "answer": "scolded the boy",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "grandfather",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the grandfather's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "grandfather",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the grandfather's involvement?",
              "answer": "the father scolded the boy",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "grandfather",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "startle the parrot",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What followed the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was followed do?",
              "answer": "startled the parrot",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the grandfather comforting the father which led to the father scolding the boy which led to the boy chasing the dog which led to the dog following the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the parrot flew",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "boy": [
            {
              "question": "What did the boy do?",
              "answer": "chase the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "Who scolded the boy?",
              "answer": "the father",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was scolded do?",
              "answer": "chased the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the boy's action?",
              "answer": "the grandfather comforting the father which led to the father scolding the boy",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the boy's involvement?",
              "answer": "the dog followed the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_16",
        "sentence": "The mosquito that the spider that the pest controller that the bird that the cat that the dog chased stalked saw sprayed ate died.",
        "structure": [
          {
            "subject": "mosquito",
            "action": "died",
            "object": null
          },
          {
            "subject": "spider",
            "action": "ate",
            "object": "mosquito"
          },
          {
            "subject": "pest controller",
            "action": "sprayed",
            "object": "spider"
          },
          {
            "subject": "bird",
            "action": "saw",
            "object": "pest controller"
          },
          {
            "subject": "cat",
            "action": "stalked",
            "object": "bird"
          },
          {
            "subject": "dog",
            "action": "chased",
            "object": "cat"
          }
        ],
        "middle_entity": "pest controller",
        "all_entities": [
          "dog",
          "mosquito",
          "spider",
          "bird",
          "pest controller",
          "cat"
        ],
        "questions_by_entity": {
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "chase the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the dog?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the dog do?",
              "answer": "stalked the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat stalked the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ],
          "mosquito": [
            {
              "question": "What did the mosquito do?",
              "answer": "die",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mosquito",
              "is_middle_entity": false
            },
            {
              "question": "What ate the mosquito?",
              "answer": "the spider",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mosquito",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mosquito",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was eaten do?",
              "answer": "died",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mosquito",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mosquito's action?",
              "answer": "the dog chasing the cat which led to the cat stalking the bird which led to the bird seeing the pest controller which led to the pest controller spraying the spider which led to the spider eating the mosquito",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mosquito",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mosquito's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mosquito",
              "is_middle_entity": false
            }
          ],
          "spider": [
            {
              "question": "What did the spider do?",
              "answer": "eat the mosquito",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "Who sprayed the spider?",
              "answer": "the pest controller",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was sprayed do?",
              "answer": "ate the mosquito",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the spider's action?",
              "answer": "the dog chasing the cat which led to the cat stalking the bird which led to the bird seeing the pest controller which led to the pest controller spraying the spider",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the spider's involvement?",
              "answer": "the mosquito died",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "see the pest controller",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What stalked the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was stalked do?",
              "answer": "saw the pest controller",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the dog chasing the cat which led to the cat stalking the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the pest controller sprayed the spider",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "pest controller": [
            {
              "question": "What did the pest controller do?",
              "answer": "spray the spider",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "pest controller",
              "is_middle_entity": true
            },
            {
              "question": "What saw the pest controller?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "pest controller",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "pest controller",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "sprayed the spider",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "pest controller",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the pest controller's action?",
              "answer": "the dog chasing the cat which led to the cat stalking the bird which led to the bird seeing the pest controller",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "pest controller",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the pest controller's involvement?",
              "answer": "the spider ate the mosquito",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "pest controller",
              "is_middle_entity": true
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "stalk the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What chased the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "stalked the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the dog chasing the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird saw the pest controller",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_17",
        "sentence": "The worm that the mouse that the cat that the dog that the mailman that the dog owner called followed chased frightened trapped wriggled.",
        "structure": [
          {
            "subject": "worm",
            "action": "wriggled",
            "object": null
          },
          {
            "subject": "mouse",
            "action": "trapped",
            "object": "worm"
          },
          {
            "subject": "cat",
            "action": "frightened",
            "object": "mouse"
          },
          {
            "subject": "dog",
            "action": "chased",
            "object": "cat"
          },
          {
            "subject": "mailman",
            "action": "followed",
            "object": "dog"
          },
          {
            "subject": "dog owner",
            "action": "called",
            "object": "mailman"
          }
        ],
        "middle_entity": "cat",
        "all_entities": [
          "worm",
          "mouse",
          "cat",
          "dog",
          "mailman",
          "dog owner"
        ],
        "questions_by_entity": {
          "worm": [
            {
              "question": "What did the worm do?",
              "answer": "wriggled",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What trapped the worm?",
              "answer": "the mouse",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was trapped do?",
              "answer": "wriggled",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the worm's action?",
              "answer": "the dog owner called the mailman which led to the mailman following the dog which led to the dog chasing the cat which led to the cat frightening the mouse which led to the mouse trapping the worm",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the worm's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "worm",
              "is_middle_entity": false
            }
          ],
          "mouse": [
            {
              "question": "What did the mouse do?",
              "answer": "trapped the worm",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What frightened the mouse?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was frightened do?",
              "answer": "trapped the worm",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mouse's action?",
              "answer": "the dog owner called the mailman which led to the mailman following the dog which led to the dog chasing the cat which led to the cat frightening the mouse",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mouse's involvement?",
              "answer": "the worm wriggled",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mouse",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "frightened the mouse",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What chased the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "frightened the mouse",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the dog owner called the mailman which led to the mailman following the dog which led to the dog chasing the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the mouse trapped the worm",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "chased the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "Who followed the dog?",
              "answer": "the mailman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was followed do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the dog owner called the mailman which led to the mailman following the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat frightened the mouse",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ],
          "mailman": [
            {
              "question": "What did the mailman do?",
              "answer": "followed the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "Who called the mailman?",
              "answer": "the dog owner",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was called do?",
              "answer": "followed the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mailman's action?",
              "answer": "the dog owner called the mailman",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mailman's involvement?",
              "answer": "the dog chased the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mailman",
              "is_middle_entity": false
            }
          ],
          "dog owner": [
            {
              "question": "What did the dog owner do?",
              "answer": "called the mailman",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog owner",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the dog owner?",
              "answer": "the mailman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog owner",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog owner",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the dog owner do?",
              "answer": "followed the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog owner",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog owner's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog owner",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog owner's involvement?",
              "answer": "the mailman followed the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog owner",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_18",
        "sentence": "The fly that the spider that the pest controller that the owner that the cat that the veterinarian treated found called sprayed caught buzzed.",
        "structure": [
          {
            "subject": "fly",
            "action": "buzzed",
            "object": null
          },
          {
            "subject": "spider",
            "action": "caught",
            "object": "fly"
          },
          {
            "subject": "pest controller",
            "action": "sprayed",
            "object": "spider"
          },
          {
            "subject": "owner",
            "action": "called",
            "object": "pest controller"
          },
          {
            "subject": "cat",
            "action": "found",
            "object": "owner"
          },
          {
            "subject": "veterinarian",
            "action": "treated",
            "object": "cat"
          }
        ],
        "middle_entity": "pest controller",
        "all_entities": [
          "veterinarian",
          "spider",
          "owner",
          "pest controller",
          "cat",
          "fly"
        ],
        "questions_by_entity": {
          "veterinarian": [
            {
              "question": "What did the veterinarian do?",
              "answer": "treat the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "veterinarian",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the veterinarian?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "veterinarian",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "veterinarian",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the veterinarian do?",
              "answer": "found the owner",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "veterinarian",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the veterinarian's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "veterinarian",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the veterinarian's involvement?",
              "answer": "the cat found the owner",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "veterinarian",
              "is_middle_entity": false
            }
          ],
          "spider": [
            {
              "question": "What did the spider do?",
              "answer": "catch the fly",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "Who sprayed the spider?",
              "answer": "the pest controller",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was sprayed do?",
              "answer": "caught the fly",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the spider's action?",
              "answer": "the veterinarian treating the cat which led to the cat finding the owner which led to the owner calling the pest controller which led to the pest controller spraying the spider",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the spider's involvement?",
              "answer": "the fly buzzed",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            }
          ],
          "owner": [
            {
              "question": "What did the owner do?",
              "answer": "call the pest controller",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "owner",
              "is_middle_entity": false
            },
            {
              "question": "What found the owner?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "owner",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "owner",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was found do?",
              "answer": "called the pest controller",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "owner",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the owner's action?",
              "answer": "the veterinarian treating the cat which led to the cat finding the owner",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "owner",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the owner's involvement?",
              "answer": "the pest controller sprayed the spider",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "owner",
              "is_middle_entity": false
            }
          ],
          "pest controller": [
            {
              "question": "What did the pest controller do?",
              "answer": "spray the spider",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "pest controller",
              "is_middle_entity": true
            },
            {
              "question": "Who called the pest controller?",
              "answer": "the owner",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "pest controller",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "pest controller",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was called do?",
              "answer": "sprayed the spider",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "pest controller",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the pest controller's action?",
              "answer": "the veterinarian treating the cat which led to the cat finding the owner which led to the owner calling the pest controller",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "pest controller",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the pest controller's involvement?",
              "answer": "the spider caught the fly",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "pest controller",
              "is_middle_entity": true
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "find the owner",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "Who treated the cat?",
              "answer": "the veterinarian",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was treated do?",
              "answer": "found the owner",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the veterinarian treating the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the owner called the pest controller",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "fly": [
            {
              "question": "What did the fly do?",
              "answer": "buzz",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What caught the fly?",
              "answer": "the spider",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "buzzed",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the fly's action?",
              "answer": "the veterinarian treating the cat which led to the cat finding the owner which led to the owner calling the pest controller which led to the pest controller spraying the spider which led to the spider catching the fly",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the fly's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fly",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_19",
        "sentence": "The cheese that the rat that the cat that the dog that the boy that the mother called walked chased caught ate smelled bad.",
        "structure": [
          {
            "subject": "cheese",
            "action": "bad",
            "object": null
          },
          {
            "subject": "rat",
            "action": "smelled",
            "object": "cheese"
          },
          {
            "subject": "cat",
            "action": "ate",
            "object": "rat"
          },
          {
            "subject": "dog",
            "action": "caught",
            "object": "cat"
          },
          {
            "subject": "boy",
            "action": "chased",
            "object": "dog"
          },
          {
            "subject": "mother",
            "action": "walked",
            "object": "boy"
          }
        ],
        "middle_entity": "cat",
        "all_entities": [
          "dog",
          "rat",
          "cheese",
          "mother",
          "cat",
          "boy"
        ],
        "questions_by_entity": {
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "chased the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "Who walked the dog?",
              "answer": "the boy",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was walked do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the mother calling the boy which led to the boy walking the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat caught the rat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ],
          "rat": [
            {
              "question": "What did the rat do?",
              "answer": "ate the cheese",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "rat",
              "is_middle_entity": false
            },
            {
              "question": "What caught the rat?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "rat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "rat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "ate the cheese",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "rat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the rat's action?",
              "answer": "the mother calling the boy which led to the boy walking the dog which led to the dog chasing the cat which led to the cat catching the rat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "rat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the rat's involvement?",
              "answer": "the cheese smelled bad",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "rat",
              "is_middle_entity": false
            }
          ],
          "cheese": [
            {
              "question": "What did the cheese do?",
              "answer": "smelled bad",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cheese",
              "is_middle_entity": false
            },
            {
              "question": "What ate the cheese?",
              "answer": "the rat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cheese",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cheese",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was eaten do?",
              "answer": "smelled bad",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cheese",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cheese's action?",
              "answer": "the mother calling the boy which led to the boy walking the dog which led to the dog chasing the cat which led to the cat catching the rat which led to the rat eating the cheese",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cheese",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cheese's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cheese",
              "is_middle_entity": false
            }
          ],
          "mother": [
            {
              "question": "What did the mother do?",
              "answer": "called the boy",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the mother?",
              "answer": "the boy",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the mother do?",
              "answer": "walked the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mother's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mother's involvement?",
              "answer": "the boy walked the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mother",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "caught the rat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What caught the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "caught the rat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the mother calling the boy which led to the boy walking the dog which led to the dog chasing the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the rat ate the cheese",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            }
          ],
          "boy": [
            {
              "question": "What did the boy do?",
              "answer": "walked the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What called the boy?",
              "answer": "the mother",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was called do?",
              "answer": "walked the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the boy's action?",
              "answer": "the mother calling the boy",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the boy's involvement?",
              "answer": "the dog chased the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_20",
        "sentence": "The ladybug that the bird that the cat that the child that the teacher that the principal reprimanded scolded tamed chased crushed died.",
        "structure": [
          {
            "subject": "ladybug",
            "action": "died",
            "object": null
          },
          {
            "subject": "bird",
            "action": "crushed",
            "object": "ladybug"
          },
          {
            "subject": "cat",
            "action": "chased",
            "object": "bird"
          },
          {
            "subject": "child",
            "action": "tamed",
            "object": "cat"
          },
          {
            "subject": "teacher",
            "action": "scolded",
            "object": "child"
          },
          {
            "subject": "principal",
            "action": "reprimanded",
            "object": "teacher"
          }
        ],
        "middle_entity": "child",
        "all_entities": [
          "ladybug",
          "bird",
          "cat",
          "child",
          "teacher",
          "principal"
        ],
        "questions_by_entity": {
          "ladybug": [
            {
              "question": "What did the ladybug do?",
              "answer": "died",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "ladybug",
              "is_middle_entity": false
            },
            {
              "question": "What crushed the ladybug?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "ladybug",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "ladybug",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was crushed do?",
              "answer": "died",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "ladybug",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the ladybug's action?",
              "answer": "the principal reprimanding the teacher which led to the teacher scolding the child which led to the child taming the cat which led to the cat chasing the bird which led to the bird crushing the ladybug",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "ladybug",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the ladybug's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "ladybug",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "crushed the ladybug",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What chased the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "crushed the ladybug",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the principal reprimanding the teacher which led to the teacher scolding the child which led to the child taming the cat which led to the cat chasing the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the ladybug died",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "chased the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "Who tamed the cat?",
              "answer": "the child",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was tamed do?",
              "answer": "chased the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the principal reprimanding the teacher which led to the teacher scolding the child which led to the child taming the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird crushed the ladybug",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "child": [
            {
              "question": "What did the child do?",
              "answer": "tamed the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": true
            },
            {
              "question": "Who scolded the child?",
              "answer": "the teacher",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scolded do?",
              "answer": "tamed the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the child's action?",
              "answer": "the principal reprimanding the teacher which led to the teacher scolding the child",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the child's involvement?",
              "answer": "the cat chased the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": true
            }
          ],
          "teacher": [
            {
              "question": "What did the teacher do?",
              "answer": "scolded the child",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "Who reprimanded the teacher?",
              "answer": "the principal",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was reprimanded do?",
              "answer": "scolded the child",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the teacher's action?",
              "answer": "the principal reprimanding the teacher",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the teacher's involvement?",
              "answer": "the child tamed the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "teacher",
              "is_middle_entity": false
            }
          ],
          "principal": [
            {
              "question": "What did the principal do?",
              "answer": "reprimanded the teacher",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the principal?",
              "answer": "the teacher",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the principal do?",
              "answer": "scolded the child",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the principal's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the principal's involvement?",
              "answer": "the teacher scolded the child",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "principal",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_21",
        "sentence": "The bug that the student that the teacher that the principal that the mayor that the reporter interviewed assigned monitored scolded caught died.",
        "structure": [
          {
            "subject": "bug",
            "action": "died",
            "object": null
          },
          {
            "subject": "student",
            "action": "caught",
            "object": "bug"
          },
          {
            "subject": "teacher",
            "action": "scolded",
            "object": "student"
          },
          {
            "subject": "principal",
            "action": "monitored",
            "object": "teacher"
          },
          {
            "subject": "mayor",
            "action": "assigned",
            "object": "principal"
          },
          {
            "subject": "reporter",
            "action": "interviewed",
            "object": "mayor"
          }
        ],
        "middle_entity": "teacher",
        "all_entities": [
          "principal",
          "teacher",
          "bug",
          "mayor",
          "student",
          "reporter"
        ],
        "questions_by_entity": {
          "principal": [
            {
              "question": "What did the principal do?",
              "answer": "monitor the teacher",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "Who assigned the principal?",
              "answer": "the mayor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was assigned do?",
              "answer": "monitored the teacher",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the principal's action?",
              "answer": "the reporter interviewing the mayor which led to the mayor assigning the principal",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the principal's involvement?",
              "answer": "the teacher scolded the student",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "principal",
              "is_middle_entity": false
            }
          ],
          "teacher": [
            {
              "question": "What did the teacher do?",
              "answer": "scold the student",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "teacher",
              "is_middle_entity": true
            },
            {
              "question": "Who monitored the teacher?",
              "answer": "the principal",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "teacher",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "teacher",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was monitored do?",
              "answer": "scolded the student",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "teacher",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the teacher's action?",
              "answer": "the reporter interviewing the mayor which led to the mayor assigning the principal which led to the principal monitoring the teacher",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "teacher",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the teacher's involvement?",
              "answer": "the student caught the bug",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "teacher",
              "is_middle_entity": true
            }
          ],
          "bug": [
            {
              "question": "What did the bug do?",
              "answer": "die",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bug",
              "is_middle_entity": false
            },
            {
              "question": "Who caught the bug?",
              "answer": "the student",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bug",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bug",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "died",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bug",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bug's action?",
              "answer": "the reporter interviewing the mayor which led to the mayor assigning the principal which led to the principal monitoring the teacher which led to the teacher scolding the student which led to the student catching the bug",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bug",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bug's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bug",
              "is_middle_entity": false
            }
          ],
          "mayor": [
            {
              "question": "What did the mayor do?",
              "answer": "assign the principal",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "Who interviewed the mayor?",
              "answer": "the reporter",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was interviewed do?",
              "answer": "assigned the principal",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mayor's action?",
              "answer": "the reporter interviewing the mayor",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mayor's involvement?",
              "answer": "the principal monitored the teacher",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mayor",
              "is_middle_entity": false
            }
          ],
          "student": [
            {
              "question": "What did the student do?",
              "answer": "catch the bug",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "student",
              "is_middle_entity": false
            },
            {
              "question": "Who scolded the student?",
              "answer": "the teacher",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "student",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "student",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was scolded do?",
              "answer": "caught the bug",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "student",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the student's action?",
              "answer": "the reporter interviewing the mayor which led to the mayor assigning the principal which led to the principal monitoring the teacher which led to the teacher scolding the student",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "student",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the student's involvement?",
              "answer": "the bug died",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "student",
              "is_middle_entity": false
            }
          ],
          "reporter": [
            {
              "question": "What did the reporter do?",
              "answer": "interview the mayor",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "reporter",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the reporter?",
              "answer": "the mayor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "reporter",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "reporter",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the reporter do?",
              "answer": "assigned the principal",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "reporter",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the reporter's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "reporter",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the reporter's involvement?",
              "answer": "the mayor assigned the principal",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "reporter",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_22",
        "sentence": "The rat that the janitor that the manager that the CEO that the attorney that the judge notified advised fired followed startled squeaked.",
        "structure": [
          {
            "subject": "rat",
            "action": "squeaked",
            "object": null
          },
          {
            "subject": "janitor",
            "action": "startled",
            "object": "rat"
          },
          {
            "subject": "manager",
            "action": "followed",
            "object": "janitor"
          },
          {
            "subject": "ceo",
            "action": "fired",
            "object": "manager"
          },
          {
            "subject": "attorney",
            "action": "advised",
            "object": "ceo"
          },
          {
            "subject": "judge",
            "action": "notified",
            "object": "attorney"
          }
        ],
        "middle_entity": "manager",
        "all_entities": [
          "attorney",
          "rat",
          "janitor",
          "ceo",
          "judge",
          "manager"
        ],
        "questions_by_entity": {
          "attorney": [
            {
              "question": "What did the attorney do?",
              "answer": "advise the ceo",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "attorney",
              "is_middle_entity": false
            },
            {
              "question": "Who notified the attorney?",
              "answer": "the judge",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "attorney",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "attorney",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was notified do?",
              "answer": "advised the ceo",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "attorney",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the attorney's action?",
              "answer": "the judge notifying the attorney",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "attorney",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the attorney's involvement?",
              "answer": "the ceo fired the manager",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "attorney",
              "is_middle_entity": false
            }
          ],
          "rat": [
            {
              "question": "What did the rat do?",
              "answer": "squeak",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "rat",
              "is_middle_entity": false
            },
            {
              "question": "Who startled the rat?",
              "answer": "the janitor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "rat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "rat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "squeaked",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "rat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the rat's action?",
              "answer": "the judge notifying the attorney which led to the attorney advising the ceo which led to the ceo firring the manager which led to the manager following the janitor which led to the janitor startling the rat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "rat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the rat's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "rat",
              "is_middle_entity": false
            }
          ],
          "janitor": [
            {
              "question": "What did the janitor do?",
              "answer": "startle the rat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "janitor",
              "is_middle_entity": false
            },
            {
              "question": "Who followed the janitor?",
              "answer": "the manager",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "janitor",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "janitor",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was followed do?",
              "answer": "startled the rat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "janitor",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the janitor's action?",
              "answer": "the judge notifying the attorney which led to the attorney advising the ceo which led to the ceo firring the manager which led to the manager following the janitor",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "janitor",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the janitor's involvement?",
              "answer": "the rat squeaked",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "janitor",
              "is_middle_entity": false
            }
          ],
          "ceo": [
            {
              "question": "What did the ceo do?",
              "answer": "fire the manager",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "ceo",
              "is_middle_entity": false
            },
            {
              "question": "Who advised the ceo?",
              "answer": "the attorney",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "ceo",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "ceo",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was advised do?",
              "answer": "fired the manager",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "ceo",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the ceo's action?",
              "answer": "the judge notifying the attorney which led to the attorney advising the ceo",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "ceo",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the ceo's involvement?",
              "answer": "the manager followed the janitor",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "ceo",
              "is_middle_entity": false
            }
          ],
          "judge": [
            {
              "question": "What did the judge do?",
              "answer": "notify the attorney",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "judge",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the judge?",
              "answer": "the attorney",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "judge",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "judge",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the judge do?",
              "answer": "advised the ceo",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "judge",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the judge's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "judge",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the judge's involvement?",
              "answer": "the attorney advised the ceo",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "judge",
              "is_middle_entity": false
            }
          ],
          "manager": [
            {
              "question": "What did the manager do?",
              "answer": "follow the janitor",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "manager",
              "is_middle_entity": true
            },
            {
              "question": "Who fired the manager?",
              "answer": "the ceo",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "manager",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "manager",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was fired do?",
              "answer": "followed the janitor",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "manager",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the manager's action?",
              "answer": "the judge notifying the attorney which led to the attorney advising the ceo which led to the ceo firring the manager",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "manager",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the manager's involvement?",
              "answer": "the janitor startled the rat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "manager",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_23",
        "sentence": "The gnat that the spider that the bird that the cat that the girl that the mother comforted lost chased ate dropped flew.",
        "structure": [
          {
            "subject": "gnat",
            "action": "flew",
            "object": null
          },
          {
            "subject": "spider",
            "action": "dropped",
            "object": "gnat"
          },
          {
            "subject": "bird",
            "action": "ate",
            "object": "spider"
          },
          {
            "subject": "cat",
            "action": "chased",
            "object": "bird"
          },
          {
            "subject": "girl",
            "action": "lost",
            "object": "cat"
          },
          {
            "subject": "mother",
            "action": "comforted",
            "object": "girl"
          }
        ],
        "middle_entity": "bird",
        "all_entities": [
          "girl",
          "mother",
          "gnat",
          "spider",
          "bird",
          "cat"
        ],
        "questions_by_entity": {
          "girl": [
            {
              "question": "What did the girl do?",
              "answer": "lose the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "Who comforted the girl?",
              "answer": "the mother",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was comforted do?",
              "answer": "lost the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the girl's action?",
              "answer": "the mother comforting the girl",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the girl's involvement?",
              "answer": "the cat chased the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "girl",
              "is_middle_entity": false
            }
          ],
          "mother": [
            {
              "question": "What did the mother do?",
              "answer": "comfort the girl",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the mother?",
              "answer": "the girl",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the mother do?",
              "answer": "lost the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mother's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mother's involvement?",
              "answer": "the girl lost the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mother",
              "is_middle_entity": false
            }
          ],
          "gnat": [
            {
              "question": "What did the gnat do?",
              "answer": "fly",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "gnat",
              "is_middle_entity": false
            },
            {
              "question": "What dropped the gnat?",
              "answer": "the spider",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "gnat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "gnat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was dropped do?",
              "answer": "flew",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "gnat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the gnat's action?",
              "answer": "the mother comforting the girl which led to the girl losing the cat which led to the cat chasing the bird which led to the bird eating the spider which led to the spider dropping the gnat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "gnat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the gnat's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "gnat",
              "is_middle_entity": false
            }
          ],
          "spider": [
            {
              "question": "What did the spider do?",
              "answer": "drop the gnat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What ate the spider?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was eaten do?",
              "answer": "dropped the gnat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the spider's action?",
              "answer": "the mother comforting the girl which led to the girl losing the cat which led to the cat chasing the bird which led to the bird eating the spider",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the spider's involvement?",
              "answer": "the gnat flew",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "eat the spider",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What chased the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "ate the spider",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the mother comforting the girl which led to the girl losing the cat which led to the cat chasing the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the spider dropped the gnat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": true
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "chase the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "Who lost the cat?",
              "answer": "the girl",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was lost do?",
              "answer": "chased the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the mother comforting the girl which led to the girl losing the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird ate the spider",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_24",
        "sentence": "The waiter that the wasp that the flower that the dog that the mailman that the writer thanked pet smelt attracted stung cried.",
        "structure": [
          {
            "subject": "waiter",
            "action": "cried",
            "object": null
          },
          {
            "subject": "wasp",
            "action": "stung",
            "object": "waiter"
          },
          {
            "subject": "flower",
            "action": "attracted",
            "object": "wasp"
          },
          {
            "subject": "dog",
            "action": "smelt",
            "object": "flower"
          },
          {
            "subject": "mailman",
            "action": "pet",
            "object": "dog"
          },
          {
            "subject": "writer",
            "action": "thanked",
            "object": "mailman"
          }
        ],
        "middle_entity": "flower",
        "all_entities": [
          "mailman",
          "dog",
          "flower",
          "writer",
          "wasp",
          "waiter"
        ],
        "questions_by_entity": {
          "mailman": [
            {
              "question": "What did the mailman do?",
              "answer": "pet the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "Who thanked the mailman?",
              "answer": "the writer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was thanked do?",
              "answer": "pet the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mailman's action?",
              "answer": "the writer thanking the mailman",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mailman's involvement?",
              "answer": "the dog smelt the flower",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mailman",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "smelt the flower",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "Who pet the dog?",
              "answer": "the mailman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was pet do?",
              "answer": "smelt the flower",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the writer thanking the mailman which led to the mailman petting the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the flower attracted the wasp",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ],
          "flower": [
            {
              "question": "What did the flower do?",
              "answer": "attract the wasp",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "flower",
              "is_middle_entity": true
            },
            {
              "question": "What smelt the flower?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "flower",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "flower",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was smelted do?",
              "answer": "attracted the wasp",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "flower",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the flower's action?",
              "answer": "the writer thanking the mailman which led to the mailman petting the dog which led to the dog smelling the flower",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "flower",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the flower's involvement?",
              "answer": "the wasp stung the waiter",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "flower",
              "is_middle_entity": true
            }
          ],
          "writer": [
            {
              "question": "What did the writer do?",
              "answer": "thank the mailman",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "writer",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the writer?",
              "answer": "the mailman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "writer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "writer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the writer do?",
              "answer": "pet the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "writer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the writer's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "writer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the writer's involvement?",
              "answer": "the mailman pet the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "writer",
              "is_middle_entity": false
            }
          ],
          "wasp": [
            {
              "question": "What did the wasp do?",
              "answer": "sting the waiter",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "wasp",
              "is_middle_entity": false
            },
            {
              "question": "What attracted the wasp?",
              "answer": "the flower",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "wasp",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "wasp",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was attracted do?",
              "answer": "stung the waiter",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "wasp",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the wasp's action?",
              "answer": "the writer thanking the mailman which led to the mailman petting the dog which led to the dog smelling the flower which led to the flower attracting the wasp",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "wasp",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the wasp's involvement?",
              "answer": "the waiter cried",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "wasp",
              "is_middle_entity": false
            }
          ],
          "waiter": [
            {
              "question": "What did the waiter do?",
              "answer": "cry",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "waiter",
              "is_middle_entity": false
            },
            {
              "question": "What stung the waiter?",
              "answer": "the wasp",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "waiter",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "waiter",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was stung do?",
              "answer": "cried",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "waiter",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the waiter's action?",
              "answer": "the writer thanking the mailman which led to the mailman petting the dog which led to the dog smelting the flower which led to the flower attracting the wasp which led to the wasp stinging the waiter",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "waiter",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the waiter's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "waiter",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_25",
        "sentence": "The ant that the spider that the boy that the parrot that the cat that the veterinarian treated adored mimicked caught dropped crawled.",
        "structure": [
          {
            "subject": "ant",
            "action": "crawled",
            "object": null
          },
          {
            "subject": "spider",
            "action": "dropped",
            "object": "ant"
          },
          {
            "subject": "boy",
            "action": "caught",
            "object": "spider"
          },
          {
            "subject": "parrot",
            "action": "mimicked",
            "object": "boy"
          },
          {
            "subject": "cat",
            "action": "adored",
            "object": "parrot"
          },
          {
            "subject": "veterinarian",
            "action": "treated",
            "object": "cat"
          }
        ],
        "middle_entity": "boy",
        "all_entities": [
          "parrot",
          "ant",
          "spider",
          "veterinarian",
          "cat",
          "boy"
        ],
        "questions_by_entity": {
          "parrot": [
            {
              "question": "What did the parrot do?",
              "answer": "mimic the boy",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "What adored the parrot?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was adored do?",
              "answer": "mimicked the boy",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the parrot's action?",
              "answer": "the veterinarian treating the cat which led to the cat adoring the parrot",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the parrot's involvement?",
              "answer": "the boy caught the spider",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "parrot",
              "is_middle_entity": false
            }
          ],
          "ant": [
            {
              "question": "What did the ant do?",
              "answer": "crawl",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "What dropped the ant?",
              "answer": "the spider",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was dropped do?",
              "answer": "crawled",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the ant's action?",
              "answer": "the veterinarian treating the cat which led to the cat adoring the parrot which led to the parrot mimicking the boy which led to the boy catching the spider which led to the spider dropping the ant",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the ant's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "ant",
              "is_middle_entity": false
            }
          ],
          "spider": [
            {
              "question": "What did the spider do?",
              "answer": "drop the ant",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "Who caught the spider?",
              "answer": "the boy",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "dropped the ant",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the spider's action?",
              "answer": "the veterinarian treating the cat which led to the cat adoring the parrot which led to the parrot mimicking the boy which led to the boy catching the spider",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the spider's involvement?",
              "answer": "the ant crawled",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            }
          ],
          "veterinarian": [
            {
              "question": "What did the veterinarian do?",
              "answer": "treat the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "veterinarian",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the veterinarian?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "veterinarian",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "veterinarian",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the veterinarian do?",
              "answer": "adored the parrot",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "veterinarian",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the veterinarian's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "veterinarian",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the veterinarian's involvement?",
              "answer": "the cat adored the parrot",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "veterinarian",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "adore the parrot",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "Who treated the cat?",
              "answer": "the veterinarian",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was treated do?",
              "answer": "adored the parrot",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the veterinarian treating the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the parrot mimicked the boy",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "boy": [
            {
              "question": "What did the boy do?",
              "answer": "catch the spider",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "What mimicked the boy?",
              "answer": "the parrot",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was mimicked do?",
              "answer": "caught the spider",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the boy's action?",
              "answer": "the veterinarian treating the cat which led to the cat adoring the parrot which led to the parrot mimicking the boy",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the boy's involvement?",
              "answer": "the spider dropped the ant",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_26",
        "sentence": "The nut that the squirrel that the car that the deer that the wolf that the hunter tracked chased hit crushed dropped rolled.",
        "structure": [
          {
            "subject": "nut",
            "action": "rolled",
            "object": null
          },
          {
            "subject": "squirrel",
            "action": "dropped",
            "object": "nut"
          },
          {
            "subject": "car",
            "action": "crushed",
            "object": "squirrel"
          },
          {
            "subject": "deer",
            "action": "hit",
            "object": "car"
          },
          {
            "subject": "wolf",
            "action": "chased",
            "object": "deer"
          },
          {
            "subject": "hunter",
            "action": "tracked",
            "object": "wolf"
          }
        ],
        "middle_entity": "car",
        "all_entities": [
          "squirrel",
          "nut",
          "car",
          "deer",
          "hunter",
          "wolf"
        ],
        "questions_by_entity": {
          "squirrel": [
            {
              "question": "What did the squirrel do?",
              "answer": "drop the nut",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "What crushed the squirrel?",
              "answer": "the car",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was crushed do?",
              "answer": "dropped the nut",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the squirrel's action?",
              "answer": "the hunter tracking the wolf which led to the wolf chasing the deer which led to the deer hitting the car which led to the car crushing the squirrel",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the squirrel's involvement?",
              "answer": "the nut rolled",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "squirrel",
              "is_middle_entity": false
            }
          ],
          "nut": [
            {
              "question": "What did the nut do?",
              "answer": "roll",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "nut",
              "is_middle_entity": false
            },
            {
              "question": "What dropped the nut?",
              "answer": "the squirrel",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "nut",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "nut",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was dropped do?",
              "answer": "rolled",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "nut",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the nut's action?",
              "answer": "the hunter tracking the wolf which led to the wolf chasing the deer which led to the deer hitting the car which led to the car crushing the squirrel which led to the squirrel dropping the nut",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "nut",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the nut's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "nut",
              "is_middle_entity": false
            }
          ],
          "car": [
            {
              "question": "What did the car do?",
              "answer": "crush the squirrel",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "car",
              "is_middle_entity": true
            },
            {
              "question": "What hit the car?",
              "answer": "the deer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "car",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "car",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was hit do?",
              "answer": "crushed the squirrel",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "car",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the car's action?",
              "answer": "the hunter tracking the wolf which led to the wolf chasing the deer which led to the deer hitting the car",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "car",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the car's involvement?",
              "answer": "the squirrel dropped the nut",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "car",
              "is_middle_entity": true
            }
          ],
          "deer": [
            {
              "question": "What did the deer do?",
              "answer": "hit the car",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "deer",
              "is_middle_entity": false
            },
            {
              "question": "What chased the deer?",
              "answer": "the wolf",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "deer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "deer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "hit the car",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "deer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the deer's action?",
              "answer": "the hunter tracking the wolf which led to the wolf chasing the deer",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "deer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the deer's involvement?",
              "answer": "the car crushed the squirrel",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "deer",
              "is_middle_entity": false
            }
          ],
          "hunter": [
            {
              "question": "What did the hunter do?",
              "answer": "track the wolf",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the hunter?",
              "answer": "the wolf",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the hunter do?",
              "answer": "chased the deer",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the hunter's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the hunter's involvement?",
              "answer": "the wolf chased the deer",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            }
          ],
          "wolf": [
            {
              "question": "What did the wolf do?",
              "answer": "chase the deer",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "Who tracked the wolf?",
              "answer": "the hunter",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was tracked do?",
              "answer": "chased the deer",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the wolf's action?",
              "answer": "the hunter tracking the wolf",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the wolf's involvement?",
              "answer": "the deer hit the car",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_27",
        "sentence": "The nurse that the doctor that the boy that the snake that the eagle that the photographer captured followed bit called advised treated the wound.",
        "structure": [
          {
            "subject": "nurse",
            "action": "treated the wound",
            "object": null
          },
          {
            "subject": "doctor",
            "action": "advised",
            "object": "nurse"
          },
          {
            "subject": "boy",
            "action": "called",
            "object": "doctor"
          },
          {
            "subject": "snake",
            "action": "bit",
            "object": "boy"
          },
          {
            "subject": "eagle",
            "action": "followed",
            "object": "snake"
          },
          {
            "subject": "photographer",
            "action": "captured",
            "object": "eagle"
          }
        ],
        "middle_entity": "boy",
        "all_entities": [
          "nurse",
          "doctor",
          "boy",
          "snake",
          "eagle",
          "photographer"
        ],
        "questions_by_entity": {
          "nurse": [
            {
              "question": "What did the nurse do?",
              "answer": "treated the wound",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "nurse",
              "is_middle_entity": false
            },
            {
              "question": "Who advised the nurse?",
              "answer": "the doctor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "nurse",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "nurse",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was advised do?",
              "answer": "treated the wound",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "nurse",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the nurse's action?",
              "answer": "the photographer capturing the eagle which led to the eagle following the snake which led to the snake biting the boy which led to the boy calling the doctor which led to the doctor advising the nurse",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "nurse",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the nurse's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "nurse",
              "is_middle_entity": false
            }
          ],
          "doctor": [
            {
              "question": "What did the doctor do?",
              "answer": "advised the nurse",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "doctor",
              "is_middle_entity": false
            },
            {
              "question": "Who called the doctor?",
              "answer": "the boy",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "doctor",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "doctor",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was called do?",
              "answer": "advised the nurse",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "doctor",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the doctor's action?",
              "answer": "the photographer capturing the eagle which led to the eagle following the snake which led to the snake biting the boy which led to the boy calling the doctor",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "doctor",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the doctor's involvement?",
              "answer": "the nurse treated the wound",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "doctor",
              "is_middle_entity": false
            }
          ],
          "boy": [
            {
              "question": "What did the boy do?",
              "answer": "called the doctor",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "What bit the boy?",
              "answer": "the snake",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was bitten do?",
              "answer": "called the doctor",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the boy's action?",
              "answer": "the photographer capturing the eagle which led to the eagle following the snake which led to the snake biting the boy",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the boy's involvement?",
              "answer": "the doctor advised the nurse",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": true
            }
          ],
          "snake": [
            {
              "question": "What did the snake do?",
              "answer": "bit the boy",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What followed the snake?",
              "answer": "the eagle",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was followed do?",
              "answer": "bit the boy",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the snake's action?",
              "answer": "the photographer capturing the eagle which led to the eagle following the snake",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the snake's involvement?",
              "answer": "the boy called the doctor",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            }
          ],
          "eagle": [
            {
              "question": "What did the eagle do?",
              "answer": "followed the snake",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "Who captured the eagle?",
              "answer": "the photographer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was captured do?",
              "answer": "followed the snake",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the eagle's action?",
              "answer": "the photographer capturing the eagle",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the eagle's involvement?",
              "answer": "the snake bit the boy",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "eagle",
              "is_middle_entity": false
            }
          ],
          "photographer": [
            {
              "question": "What did the photographer do?",
              "answer": "captured the eagle",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "photographer",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the photographer?",
              "answer": "the eagle",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "photographer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "photographer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the photographer do?",
              "answer": "followed the snake",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "photographer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the photographer's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "photographer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the photographer's involvement?",
              "answer": "the eagle followed the snake",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "photographer",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_28",
        "sentence": "The worm that the bird that the snake that the lioness that the lion that the naturalist documented adored eyed chased caught wriggled.",
        "structure": [
          {
            "subject": "worm",
            "action": "wriggled",
            "object": null
          },
          {
            "subject": "bird",
            "action": "caught",
            "object": "worm"
          },
          {
            "subject": "snake",
            "action": "chased",
            "object": "bird"
          },
          {
            "subject": "lioness",
            "action": "eyed",
            "object": "snake"
          },
          {
            "subject": "lion",
            "action": "adored",
            "object": "lioness"
          },
          {
            "subject": "naturalist",
            "action": "documented",
            "object": "lion"
          }
        ],
        "middle_entity": "snake",
        "all_entities": [
          "naturalist",
          "lion",
          "worm",
          "bird",
          "snake",
          "lioness"
        ],
        "questions_by_entity": {
          "naturalist": [
            {
              "question": "What did the naturalist do?",
              "answer": "document the lion",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "naturalist",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the naturalist?",
              "answer": "the lion",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "naturalist",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "naturalist",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the naturalist do?",
              "answer": "adored the lioness",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "naturalist",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the naturalist's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "naturalist",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the naturalist's involvement?",
              "answer": "the lion adored the lioness",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "naturalist",
              "is_middle_entity": false
            }
          ],
          "lion": [
            {
              "question": "What did the lion do?",
              "answer": "adore the lioness",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "lion",
              "is_middle_entity": false
            },
            {
              "question": "Who documented the lion?",
              "answer": "the naturalist",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "lion",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "lion",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was documented do?",
              "answer": "adored the lioness",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "lion",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the lion's action?",
              "answer": "the naturalist documenting the lion",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "lion",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the lion's involvement?",
              "answer": "the lioness eyed the snake",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "lion",
              "is_middle_entity": false
            }
          ],
          "worm": [
            {
              "question": "What did the worm do?",
              "answer": "wriggle",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What caught the worm?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was caught do?",
              "answer": "wriggled",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the worm's action?",
              "answer": "the naturalist documenting the lion which led to the lion adoring the lioness which led to the lioness eying the snake which led to the snake chasing the bird which led to the bird catching the worm",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the worm's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "worm",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "catch the worm",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What chased the bird?",
              "answer": "the snake",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "caught the worm",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the naturalist documenting the lion which led to the lion adoring the lioness which led to the lioness eying the snake which led to the snake chasing the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the worm wriggled",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "snake": [
            {
              "question": "What did the snake do?",
              "answer": "chase the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What eyed the snake?",
              "answer": "the lioness",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was eyed do?",
              "answer": "chased the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the snake's action?",
              "answer": "the naturalist documenting the lion which led to the lion adoring the lioness which led to the lioness eying the snake",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the snake's involvement?",
              "answer": "the bird caught the worm",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": true
            }
          ],
          "lioness": [
            {
              "question": "What did the lioness do?",
              "answer": "eye the snake",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "lioness",
              "is_middle_entity": false
            },
            {
              "question": "What adored the lioness?",
              "answer": "the lion",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "lioness",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "lioness",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was adored do?",
              "answer": "eyed the snake",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "lioness",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the lioness's action?",
              "answer": "the naturalist documenting the lion which led to the lion adoring the lioness",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "lioness",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the lioness's involvement?",
              "answer": "the snake chased the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "lioness",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_29",
        "sentence": "The judge that the secretary that the clerk that the intern that the janitor that the garbage man assisted guided informed briefed consulted ruled.",
        "structure": [
          {
            "subject": "judge",
            "action": "ruled",
            "object": null
          },
          {
            "subject": "secretary",
            "action": "consulted",
            "object": "judge"
          },
          {
            "subject": "clerk",
            "action": "briefed",
            "object": "secretary"
          },
          {
            "subject": "intern",
            "action": "informed",
            "object": "clerk"
          },
          {
            "subject": "janitor",
            "action": "guided",
            "object": "intern"
          },
          {
            "subject": "garbage man",
            "action": "assisted",
            "object": "janitor"
          }
        ],
        "middle_entity": "clerk",
        "all_entities": [
          "secretary",
          "intern",
          "janitor",
          "clerk",
          "judge",
          "garbage man"
        ],
        "questions_by_entity": {
          "secretary": [
            {
              "question": "What did the secretary do?",
              "answer": "consult the judge",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "secretary",
              "is_middle_entity": false
            },
            {
              "question": "Who briefed the secretary?",
              "answer": "the clerk",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "secretary",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "secretary",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was briefed do?",
              "answer": "consulted the judge",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "secretary",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the secretary's action?",
              "answer": "the garbage man assisting the janitor which led to the janitor guiding the intern which led to the intern informing the clerk which led to the clerk briefing the secretary",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "secretary",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the secretary's involvement?",
              "answer": "the judge ruled",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "secretary",
              "is_middle_entity": false
            }
          ],
          "intern": [
            {
              "question": "What did the intern do?",
              "answer": "inform the clerk",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "intern",
              "is_middle_entity": false
            },
            {
              "question": "Who guided the intern?",
              "answer": "the janitor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "intern",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "intern",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was guided do?",
              "answer": "informed the clerk",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "intern",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the intern's action?",
              "answer": "the garbage man assisting the janitor which led to the janitor guiding the intern",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "intern",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the intern's involvement?",
              "answer": "the clerk briefed the secretary",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "intern",
              "is_middle_entity": false
            }
          ],
          "janitor": [
            {
              "question": "What did the janitor do?",
              "answer": "guide the intern",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "janitor",
              "is_middle_entity": false
            },
            {
              "question": "Who assisted the janitor?",
              "answer": "the garbage man",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "janitor",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "janitor",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was assisted do?",
              "answer": "guided the intern",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "janitor",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the janitor's action?",
              "answer": "the garbage man assisting the janitor",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "janitor",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the janitor's involvement?",
              "answer": "the intern informed the clerk",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "janitor",
              "is_middle_entity": false
            }
          ],
          "clerk": [
            {
              "question": "What did the clerk do?",
              "answer": "brief the secretary",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "clerk",
              "is_middle_entity": true
            },
            {
              "question": "Who informed the clerk?",
              "answer": "the intern",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "clerk",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "clerk",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was informed do?",
              "answer": "briefed the secretary",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "clerk",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the clerk's action?",
              "answer": "the garbage man assisting the janitor which led to the janitor guiding the intern which led to the intern informing the clerk",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "clerk",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the clerk's involvement?",
              "answer": "the secretary consulted the judge",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "clerk",
              "is_middle_entity": true
            }
          ],
          "judge": [
            {
              "question": "What did the judge do?",
              "answer": "rule",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "judge",
              "is_middle_entity": false
            },
            {
              "question": "Who consulted the judge?",
              "answer": "the secretary",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "judge",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "judge",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was consulted do?",
              "answer": "ruled",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "judge",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the judge's action?",
              "answer": "the garbage man assisting the janitor which led to the janitor guiding the intern which led to the intern informing the clerk which led to the clerk briefing the secretary which led to the secretary consulting the judge",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "judge",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the judge's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "judge",
              "is_middle_entity": false
            }
          ],
          "garbage man": [
            {
              "question": "What did the garbage man do?",
              "answer": "assist the janitor",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "garbage man",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the garbage man?",
              "answer": "the janitor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "garbage man",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "garbage man",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the garbage man do?",
              "answer": "guided the intern",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "garbage man",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the garbage man's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "garbage man",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the garbage man's involvement?",
              "answer": "the janitor guided the intern",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "garbage man",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 36
      },
      {
        "id": "complexity_5_sentence_30",
        "sentence": "The mechanic that the bus driver that the taxi that the motorcycle that the bicycle that the skateboard hit tailed overtook followed called greeted.",
        "structure": [
          {
            "subject": "mechanic",
            "action": "greeted",
            "object": null
          },
          {
            "subject": "bus driver",
            "action": "called",
            "object": "mechanic"
          },
          {
            "subject": "taxi",
            "action": "followed",
            "object": "bus driver"
          },
          {
            "subject": "motorcycle",
            "action": "overtook",
            "object": "taxi"
          },
          {
            "subject": "bicycle",
            "action": "tailed",
            "object": "motorcycle"
          },
          {
            "subject": "skateboard",
            "action": "hit",
            "object": "bicycle"
          }
        ],
        "middle_entity": "taxi",
        "all_entities": [
          "bicycle",
          "bus driver",
          "motorcycle",
          "mechanic",
          "taxi",
          "skateboard"
        ],
        "questions_by_entity": {
          "bicycle": [
            {
              "question": "What did the bicycle do?",
              "answer": "tail the motorcycle",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bicycle",
              "is_middle_entity": false
            },
            {
              "question": "What hit the bicycle?",
              "answer": "the skateboard",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bicycle",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bicycle",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was hit do?",
              "answer": "tailed the motorcycle",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bicycle",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bicycle's action?",
              "answer": "the skateboard hitting the bicycle",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bicycle",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bicycle's involvement?",
              "answer": "the motorcycle overtook the taxi",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bicycle",
              "is_middle_entity": false
            }
          ],
          "bus driver": [
            {
              "question": "What did the bus driver do?",
              "answer": "call the mechanic",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bus driver",
              "is_middle_entity": false
            },
            {
              "question": "What followed the bus driver?",
              "answer": "the taxi",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bus driver",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bus driver",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was followed do?",
              "answer": "called the mechanic",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bus driver",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bus driver's action?",
              "answer": "the skateboard hitting the bicycle which led to the bicycle tailing the motorcycle which led to the motorcycle overtaking the taxi which led to the taxi following the bus driver",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bus driver",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bus driver's involvement?",
              "answer": "the mechanic greeted",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bus driver",
              "is_middle_entity": false
            }
          ],
          "motorcycle": [
            {
              "question": "What did the motorcycle do?",
              "answer": "overtook the taxi",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "motorcycle",
              "is_middle_entity": false
            },
            {
              "question": "What tailed the motorcycle?",
              "answer": "the bicycle",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "motorcycle",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "motorcycle",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was tailed do?",
              "answer": "overtook the taxi",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "motorcycle",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the motorcycle's action?",
              "answer": "the skateboard hitting the bicycle which led to the bicycle tailing the motorcycle",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "motorcycle",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the motorcycle's involvement?",
              "answer": "the taxi followed the bus driver",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "motorcycle",
              "is_middle_entity": false
            }
          ],
          "mechanic": [
            {
              "question": "What did the mechanic do?",
              "answer": "greet",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mechanic",
              "is_middle_entity": false
            },
            {
              "question": "Who called the mechanic?",
              "answer": "the bus driver",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mechanic",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mechanic",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was called do?",
              "answer": "greeted",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mechanic",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mechanic's action?",
              "answer": "the skateboard hitting the bicycle which led to the bicycle tailing the motorcycle which led to the motorcycle overtaking the taxi which led to the taxi following the bus driver which led to the bus driver calling the mechanic",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mechanic",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mechanic's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mechanic",
              "is_middle_entity": false
            }
          ],
          "taxi": [
            {
              "question": "What did the taxi do?",
              "answer": "follow the bus driver",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "taxi",
              "is_middle_entity": true
            },
            {
              "question": "What overtook the taxi?",
              "answer": "the motorcycle",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "taxi",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "taxi",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was overtaken do?",
              "answer": "followed the bus driver",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "taxi",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the taxi's action?",
              "answer": "the skateboard hitting the bicycle which led to the bicycle tailing the motorcycle which led to the motorcycle overtaking the taxi",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "taxi",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the taxi's involvement?",
              "answer": "the bus driver called the mechanic",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "taxi",
              "is_middle_entity": true
            }
          ],
          "skateboard": [
            {
              "question": "What did the skateboard do?",
              "answer": "hit the bicycle",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "skateboard",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the skateboard?",
              "answer": "the bicycle",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "skateboard",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "6",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "skateboard",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the skateboard do?",
              "answer": "tailed the motorcycle",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "skateboard",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the skateboard's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "skateboard",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the skateboard's involvement?",
              "answer": "the bicycle tailed the motorcycle",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "skateboard",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 36
      }
    ],
    "total_questions": 1068,
    "entities_processed": 178,
    "middle_entities_flagged": 30
  },
  "complexity_6": {
    "sentences": [
      {
        "id": "complexity_6_sentence_1",
        "sentence": "The chicken that the fox that the wolf that the bear that the hunter that the park ranger that the sheriff observed tracked chased startled noticed approached clucked.",
        "structure": [
          {
            "subject": "chicken",
            "action": "clucked",
            "object": null
          },
          {
            "subject": "fox",
            "action": "approached",
            "object": "chicken"
          },
          {
            "subject": "wolf",
            "action": "noticed",
            "object": "fox"
          },
          {
            "subject": "bear",
            "action": "startled",
            "object": "wolf"
          },
          {
            "subject": "hunter",
            "action": "chased",
            "object": "bear"
          },
          {
            "subject": "park ranger",
            "action": "tracked",
            "object": "hunter"
          },
          {
            "subject": "sheriff",
            "action": "observed",
            "object": "park ranger"
          }
        ],
        "middle_entity": "bear",
        "all_entities": [
          "sheriff",
          "fox",
          "bear",
          "park ranger",
          "chicken",
          "hunter",
          "wolf"
        ],
        "questions_by_entity": {
          "sheriff": [
            {
              "question": "What did the sheriff do?",
              "answer": "observe the park ranger",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "sheriff",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the sheriff?",
              "answer": "the park ranger",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "sheriff",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "sheriff",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the sheriff do?",
              "answer": "tracked the hunter",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "sheriff",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the sheriff's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "sheriff",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the sheriff's involvement?",
              "answer": "the park ranger tracked the hunter",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "sheriff",
              "is_middle_entity": false
            }
          ],
          "fox": [
            {
              "question": "What did the fox do?",
              "answer": "approach the chicken",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What noticed the fox?",
              "answer": "the wolf",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was noticed do?",
              "answer": "approached the chicken",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the fox's action?",
              "answer": "the sheriff observing the park ranger which led to the park ranger tracking the hunter which led to the hunter chasing the bear which led to the bear startling the wolf which led to the wolf noticing the fox",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the fox's involvement?",
              "answer": "the chicken clucked",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": false
            }
          ],
          "bear": [
            {
              "question": "What did the bear do?",
              "answer": "startle the wolf",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": true
            },
            {
              "question": "Who chased the bear?",
              "answer": "the hunter",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "startled the wolf",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the bear's action?",
              "answer": "the sheriff observing the park ranger which led to the park ranger tracking the hunter which led to the hunter chasing the bear",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the bear's involvement?",
              "answer": "the wolf noticed the fox",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": true
            }
          ],
          "park ranger": [
            {
              "question": "What did the park ranger do?",
              "answer": "track the hunter",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "Who observed the park ranger?",
              "answer": "the sheriff",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was observed do?",
              "answer": "tracked the hunter",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the park ranger's action?",
              "answer": "the sheriff observing the park ranger",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the park ranger's involvement?",
              "answer": "the hunter chased the bear",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "park ranger",
              "is_middle_entity": false
            }
          ],
          "chicken": [
            {
              "question": "What did the chicken do?",
              "answer": "cluck",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "What approached the chicken?",
              "answer": "the fox",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was approached do?",
              "answer": "clucked",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the chicken's action?",
              "answer": "the sheriff observing the park ranger which led to the park ranger tracking the hunter which led to the hunter chasing the bear which led to the bear startling the wolf which led to the wolf noticing the fox which led to the fox approaching the chicken",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "chicken",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the chicken's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "chicken",
              "is_middle_entity": false
            }
          ],
          "hunter": [
            {
              "question": "What did the hunter do?",
              "answer": "chase the bear",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "Who tracked the hunter?",
              "answer": "the park ranger",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was tracked do?",
              "answer": "chased the bear",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the hunter's action?",
              "answer": "the sheriff observing the park ranger which led to the park ranger tracking the hunter",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the hunter's involvement?",
              "answer": "the bear startled the wolf",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            }
          ],
          "wolf": [
            {
              "question": "What did the wolf do?",
              "answer": "notice the fox",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What startled the wolf?",
              "answer": "the bear",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "noticed the fox",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the wolf's action?",
              "answer": "the sheriff observing the park ranger which led to the park ranger tracking the hunter which led to the hunter chasing the bear which led to the bear startling the wolf",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the wolf's involvement?",
              "answer": "the fox approached the chicken",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_2",
        "sentence": "The starfish that the crab that the octopus that the seal that the shark that the whale that the diver observed swam past startled brushed touched startled crawled.",
        "structure": [
          {
            "subject": "starfish",
            "action": "crawled",
            "object": null
          },
          {
            "subject": "crab",
            "action": "startled",
            "object": "starfish"
          },
          {
            "subject": "octopus",
            "action": "touched",
            "object": "crab"
          },
          {
            "subject": "seal",
            "action": "brushed",
            "object": "octopus"
          },
          {
            "subject": "shark",
            "action": "startled",
            "object": "seal"
          },
          {
            "subject": "whale",
            "action": "swam past",
            "object": "shark"
          },
          {
            "subject": "diver",
            "action": "observed",
            "object": "whale"
          }
        ],
        "middle_entity": "seal",
        "all_entities": [
          "whale",
          "starfish",
          "crab",
          "octopus",
          "seal",
          "shark",
          "diver"
        ],
        "questions_by_entity": {
          "whale": [
            {
              "question": "What did the whale do?",
              "answer": "swim past the shark",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "whale",
              "is_middle_entity": false
            },
            {
              "question": "Who observed the whale?",
              "answer": "the diver",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "whale",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "whale",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was observed do?",
              "answer": "swam past the shark",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "whale",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the whale's action?",
              "answer": "the diver observing the whale",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "whale",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the whale's involvement?",
              "answer": "the shark startled the seal",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "whale",
              "is_middle_entity": false
            }
          ],
          "starfish": [
            {
              "question": "What did the starfish do?",
              "answer": "crawl",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "What startled the starfish?",
              "answer": "the crab",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "crawled",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the starfish's action?",
              "answer": "the diver observing the whale which led to the whale swimming past the shark which led to the shark startling the seal which led to the seal brushing the octopus which led to the octopus touching the crab which led to the crab startling the starfish",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the starfish's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "starfish",
              "is_middle_entity": false
            }
          ],
          "crab": [
            {
              "question": "What did the crab do?",
              "answer": "startle the starfish",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "crab",
              "is_middle_entity": false
            },
            {
              "question": "What touched the crab?",
              "answer": "the octopus",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "crab",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "crab",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was touched do?",
              "answer": "startled the starfish",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "crab",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the crab's action?",
              "answer": "the diver observing the whale which led to the whale swimming past the shark which led to the shark startling the seal which led to the seal brushing the octopus which led to the octopus touching the crab",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "crab",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the crab's involvement?",
              "answer": "the starfish crawled",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "crab",
              "is_middle_entity": false
            }
          ],
          "octopus": [
            {
              "question": "What did the octopus do?",
              "answer": "touch the crab",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "octopus",
              "is_middle_entity": false
            },
            {
              "question": "What brushed the octopus?",
              "answer": "the seal",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "octopus",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "octopus",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was brushed do?",
              "answer": "touched the crab",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "octopus",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the octopus's action?",
              "answer": "the diver observing the whale which led to the whale swimming past the shark which led to the shark startling the seal which led to the seal brushing the octopus",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "octopus",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the octopus's involvement?",
              "answer": "the crab startled the starfish",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "octopus",
              "is_middle_entity": false
            }
          ],
          "seal": [
            {
              "question": "What did the seal do?",
              "answer": "What did the seal do?",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "seal",
              "is_middle_entity": true
            },
            {
              "question": "What startled the seal?",
              "answer": "the shark",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "seal",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "seal",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "brushed the octopus",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "seal",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the seal's action?",
              "answer": "the diver observing the whale which led to the whale swimming past the shark which led to the shark startling the seal",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "seal",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the seal's involvement?",
              "answer": "the octopus touched the crab",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "seal",
              "is_middle_entity": true
            }
          ],
          "shark": [
            {
              "question": "What did the shark do?",
              "answer": "startle the seal",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "What swam past the shark?",
              "answer": "the whale",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was swum past do?",
              "answer": "startled the seal",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the shark's action?",
              "answer": "the diver observing the whale which led to the whale swimming past the shark",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the shark's involvement?",
              "answer": "the seal brushed the octopus",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "shark",
              "is_middle_entity": false
            }
          ],
          "diver": [
            {
              "question": "What did the diver do?",
              "answer": "observe the whale",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "diver",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the diver?",
              "answer": "the whale",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "diver",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "diver",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the diver do?",
              "answer": "swam past the shark",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "diver",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the diver's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "diver",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the diver's involvement?",
              "answer": "the whale swam past the shark",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "diver",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_3",
        "sentence": "The mouse that the cat that the dog that the boy that the teacher that the principal that the superintendent saw followed corrected instructed chased alerted squeaked.",
        "structure": [
          {
            "subject": "mouse",
            "action": "squeaked",
            "object": null
          },
          {
            "subject": "cat",
            "action": "alerted",
            "object": "mouse"
          },
          {
            "subject": "dog",
            "action": "chased",
            "object": "cat"
          },
          {
            "subject": "boy",
            "action": "instructed",
            "object": "dog"
          },
          {
            "subject": "teacher",
            "action": "corrected",
            "object": "boy"
          },
          {
            "subject": "principal",
            "action": "followed",
            "object": "teacher"
          },
          {
            "subject": "superintendent",
            "action": "saw",
            "object": "principal"
          }
        ],
        "middle_entity": "boy",
        "all_entities": [
          "principal",
          "dog",
          "teacher",
          "mouse",
          "superintendent",
          "cat",
          "boy"
        ],
        "questions_by_entity": {
          "principal": [
            {
              "question": "What did the principal do?",
              "answer": "follow the teacher",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "Who saw the principal?",
              "answer": "the superintendent",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "followed the teacher",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the principal's action?",
              "answer": "the superintendent seeing the principal",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the principal's involvement?",
              "answer": "the teacher corrected the boy",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "principal",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "chase the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "Who instructed the dog?",
              "answer": "the boy",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was instructed do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the superintendent seeing the principal which led to the principal following the teacher which led to the teacher correcting the boy which led to the boy instructing the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat alerted the mouse",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ],
          "teacher": [
            {
              "question": "What did the teacher do?",
              "answer": "correct the boy",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "Who followed the teacher?",
              "answer": "the principal",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was followed do?",
              "answer": "corrected the boy",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the teacher's action?",
              "answer": "the superintendent seeing the principal which led to the principal following the teacher",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the teacher's involvement?",
              "answer": "the boy instructed the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "teacher",
              "is_middle_entity": false
            }
          ],
          "mouse": [
            {
              "question": "What did the mouse do?",
              "answer": "squeak",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What alerted the mouse?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was alerted do?",
              "answer": "squeaked",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mouse's action?",
              "answer": "the superintendent seeing the principal which led to the principal following the teacher which led to the teacher correcting the boy which led to the boy instructing the dog which led to the dog chasing the cat which led to the cat alerting the mouse",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mouse's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mouse",
              "is_middle_entity": false
            }
          ],
          "superintendent": [
            {
              "question": "What did the superintendent do?",
              "answer": "see the principal",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "superintendent",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the superintendent?",
              "answer": "the principal",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "superintendent",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "superintendent",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the superintendent do?",
              "answer": "followed the teacher",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "superintendent",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the superintendent's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "superintendent",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the superintendent's involvement?",
              "answer": "the principal followed the teacher",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "superintendent",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "alert the mouse",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What chased the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "alerted the mouse",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the superintendent seeing the principal which led to the principal following the teacher which led to the teacher correcting the boy which led to the boy instructing the dog which led to the dog chasing the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the mouse squeaked",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "boy": [
            {
              "question": "What did the boy do?",
              "answer": "instruct the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "Who corrected the boy?",
              "answer": "the teacher",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was corrected do?",
              "answer": "instructed the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the boy's action?",
              "answer": "the superintendent seeing the principal which led to the principal following the teacher which led to the teacher correcting the boy",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the boy's involvement?",
              "answer": "the dog chased the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_4",
        "sentence": "The worm that the bird that the cat that the dog that the boy that the teacher that the principal noticed startled chased barked hissed pecked wiggled.",
        "structure": [
          {
            "subject": "worm",
            "action": "wiggled",
            "object": null
          },
          {
            "subject": "bird",
            "action": "pecked",
            "object": "worm"
          },
          {
            "subject": "cat",
            "action": "hissed",
            "object": "bird"
          },
          {
            "subject": "dog",
            "action": "barked",
            "object": "cat"
          },
          {
            "subject": "boy",
            "action": "chased",
            "object": "dog"
          },
          {
            "subject": "teacher",
            "action": "startled",
            "object": "boy"
          },
          {
            "subject": "principal",
            "action": "noticed",
            "object": "teacher"
          }
        ],
        "middle_entity": "dog",
        "all_entities": [
          "principal",
          "dog",
          "teacher",
          "worm",
          "bird",
          "cat",
          "boy"
        ],
        "questions_by_entity": {
          "principal": [
            {
              "question": "What did the principal do?",
              "answer": "notice the teacher",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the principal?",
              "answer": "the teacher",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the principal do?",
              "answer": "startled the boy",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the principal's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the principal's involvement?",
              "answer": "the teacher startled the boy",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "principal",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "bark the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "Who chased the dog?",
              "answer": "the boy",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "barked the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the principal noticing the teacher which led to the teacher startling the boy which led to the boy chasing the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat hissed the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            }
          ],
          "teacher": [
            {
              "question": "What did the teacher do?",
              "answer": "startle the boy",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "Who noticed the teacher?",
              "answer": "the principal",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was noticed do?",
              "answer": "startled the boy",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the teacher's action?",
              "answer": "the principal noticing the teacher",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the teacher's involvement?",
              "answer": "the boy chased the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "teacher",
              "is_middle_entity": false
            }
          ],
          "worm": [
            {
              "question": "What did the worm do?",
              "answer": "wiggle",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What pecked the worm?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was pecked do?",
              "answer": "wiggled",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the worm's action?",
              "answer": "the principal noticing the teacher which led to the teacher startling the boy which led to the boy chasing the dog which led to the dog barking the cat which led to the cat hissing at the bird which led to the bird pecking the worm",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the worm's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "worm",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "peck the worm",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What hissed the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was hissed do?",
              "answer": "pecked the worm",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the principal noticing the teacher which led to the teacher startling the boy which led to the boy chasing the dog which led to the dog barking the cat which led to the cat hissing at the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the worm wiggled",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "hiss at the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What barked the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was barked do?",
              "answer": "hissed at the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the principal noticing the teacher which led to the teacher startling the boy which led to the boy chasing the dog which led to the dog barking the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird pecked the worm",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "boy": [
            {
              "question": "What did the boy do?",
              "answer": "chase the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "Who startled the boy?",
              "answer": "the teacher",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "chased the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the boy's action?",
              "answer": "the principal noticing the teacher which led to the teacher startling the boy",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the boy's involvement?",
              "answer": "the dog barked the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_5",
        "sentence": "The bug that the lizard that the snake that the mongoose that the leopard that the elephant that the zookeeper cared for walked past startled hissed at lunged at chased ate died.",
        "structure": [
          {
            "subject": "bug",
            "action": "died",
            "object": null
          },
          {
            "subject": "lizard",
            "action": "ate",
            "object": "bug"
          },
          {
            "subject": "snake",
            "action": "chased",
            "object": "lizard"
          },
          {
            "subject": "mongoose",
            "action": "lunged at",
            "object": "snake"
          },
          {
            "subject": "leopard",
            "action": "hissed at",
            "object": "mongoose"
          },
          {
            "subject": "elephant",
            "action": "startled",
            "object": "leopard"
          },
          {
            "subject": "zookeeper",
            "action": "walked past",
            "object": "elephant"
          }
        ],
        "middle_entity": "mongoose",
        "all_entities": [
          "leopard",
          "mongoose",
          "zookeeper",
          "bug",
          "lizard",
          "elephant",
          "snake"
        ],
        "questions_by_entity": {
          "leopard": [
            {
              "question": "What did the leopard do?",
              "answer": "hiss at the mongoose",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "leopard",
              "is_middle_entity": false
            },
            {
              "question": "What startled the leopard?",
              "answer": "the elephant",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "leopard",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "leopard",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "hissed at the mongoose",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "leopard",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the leopard's action?",
              "answer": "the zookeeper walking past the elephant which led to the elephant startling the leopard",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "leopard",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the leopard's involvement?",
              "answer": "the mongoose lunged at the snake",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "leopard",
              "is_middle_entity": false
            }
          ],
          "mongoose": [
            {
              "question": "What did the mongoose do?",
              "answer": "lung at the snake",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mongoose",
              "is_middle_entity": true
            },
            {
              "question": "What hissed at the mongoose?",
              "answer": "the leopard",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mongoose",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mongoose",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was hissed at do?",
              "answer": "lunged at the snake",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mongoose",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the mongoose's action?",
              "answer": "the zookeeper walking past the elephant which led to the elephant startling the leopard which led to the leopard hissing at the mongoose",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mongoose",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the mongoose's involvement?",
              "answer": "the snake chased the lizard",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mongoose",
              "is_middle_entity": true
            }
          ],
          "zookeeper": [
            {
              "question": "What did the zookeeper do?",
              "answer": "walk past the elephant",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the zookeeper?",
              "answer": "the elephant",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the zookeeper do?",
              "answer": "startled the leopard",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the zookeeper's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the zookeeper's involvement?",
              "answer": "the elephant startled the leopard",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "zookeeper",
              "is_middle_entity": false
            }
          ],
          "bug": [
            {
              "question": "What did the bug do?",
              "answer": "die",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bug",
              "is_middle_entity": false
            },
            {
              "question": "What ate the bug?",
              "answer": "the lizard",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bug",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bug",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was eaten do?",
              "answer": "died",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bug",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bug's action?",
              "answer": "the zookeeper walking past the elephant which led to the elephant startling the leopard which led to the leopard hissing at the mongoose which led to the mongoose lunging at the snake which led to the snake chasing the lizard which led to the lizard eating the bug",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bug",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bug's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bug",
              "is_middle_entity": false
            }
          ],
          "lizard": [
            {
              "question": "What did the lizard do?",
              "answer": "eat the bug",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "lizard",
              "is_middle_entity": false
            },
            {
              "question": "What chased the lizard?",
              "answer": "the snake",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "lizard",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "lizard",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "ate the bug",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "lizard",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the lizard's action?",
              "answer": "the zookeeper walking past the elephant which led to the elephant startling the leopard which led to the leopard hissing at the mongoose which led to the mongoose lunging at the snake which led to the snake chasing the lizard",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "lizard",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the lizard's involvement?",
              "answer": "the bug died",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "lizard",
              "is_middle_entity": false
            }
          ],
          "elephant": [
            {
              "question": "What did the elephant do?",
              "answer": "startle the leopard",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "elephant",
              "is_middle_entity": false
            },
            {
              "question": "Who walked past the elephant?",
              "answer": "the zookeeper",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "elephant",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "elephant",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was walked past do?",
              "answer": "startled the leopard",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "elephant",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the elephant's action?",
              "answer": "the zookeeper walking past the elephant",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "elephant",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the elephant's involvement?",
              "answer": "the leopard hissed at the mongoose",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "elephant",
              "is_middle_entity": false
            }
          ],
          "snake": [
            {
              "question": "What did the snake do?",
              "answer": "chase the lizard",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What lunged at the snake?",
              "answer": "the mongoose",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was lunged at do?",
              "answer": "chased the lizard",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the snake's action?",
              "answer": "the zookeeper walking past the elephant which led to the elephant startling the leopard which led to the leopard hissing at the mongoose which led to the mongoose lunging at the snake",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the snake's involvement?",
              "answer": "the lizard ate the bug",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_6",
        "sentence": "The parrot that the cat that the dog that the child that the mother that the mailman that the neighbor heard called scolded left ran from hissed at squawked.",
        "structure": [
          {
            "subject": "parrot",
            "action": "squawked",
            "object": null
          },
          {
            "subject": "cat",
            "action": "hissed at",
            "object": "parrot"
          },
          {
            "subject": "dog",
            "action": "ran from",
            "object": "cat"
          },
          {
            "subject": "child",
            "action": "left",
            "object": "dog"
          },
          {
            "subject": "mother",
            "action": "scolded",
            "object": "child"
          },
          {
            "subject": "mailman",
            "action": "called",
            "object": "mother"
          },
          {
            "subject": "neighbor",
            "action": "heard",
            "object": "mailman"
          }
        ],
        "middle_entity": "child",
        "all_entities": [
          "parrot",
          "cat",
          "dog",
          "child",
          "mother",
          "mailman",
          "neighbor"
        ],
        "questions_by_entity": {
          "parrot": [
            {
              "question": "What did the parrot do?",
              "answer": "squawked",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "What hissed at the parrot?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was hissed at do?",
              "answer": "squawked",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the parrot's action?",
              "answer": "the neighbor hearing the mailman which led to the mailman calling the mother which led to the mother scolding the child which led to the child leaving the dog which led to the dog running from the cat which led to the cat hissing at the parrot",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "parrot",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the parrot's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "parrot",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "hissed at the parrot",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What ran from the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was ran from do?",
              "answer": "hissed at the parrot",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the neighbor hearing the mailman which led to the mailman calling the mother which led to the mother scolding the child which led to the child leaving the dog which led to the dog running from the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the parrot squawked",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "ran from the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "Who left the dog?",
              "answer": "the child",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was left do?",
              "answer": "ran from the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the neighbor hearing the mailman which led to the mailman calling the mother which led to the mother scolding the child which led to the child leaving the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat hissed at the parrot",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ],
          "child": [
            {
              "question": "What did the child do?",
              "answer": "left the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": true
            },
            {
              "question": "Who scolded the child?",
              "answer": "the mother",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scolded do?",
              "answer": "left the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the child's action?",
              "answer": "the neighbor hearing the mailman which led to the mailman calling the mother which led to the mother scolding the child",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the child's involvement?",
              "answer": "the dog ran from the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": true
            }
          ],
          "mother": [
            {
              "question": "What did the mother do?",
              "answer": "scolded the child",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "Who called the mother?",
              "answer": "the mailman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was called do?",
              "answer": "scolded the child",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mother's action?",
              "answer": "the neighbor hearing the mailman which led to the mailman calling the mother",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mother's involvement?",
              "answer": "the child left the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mother",
              "is_middle_entity": false
            }
          ],
          "mailman": [
            {
              "question": "What did the mailman do?",
              "answer": "called the mother",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "Who heard the mailman?",
              "answer": "the neighbor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was heard do?",
              "answer": "called the mother",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mailman's action?",
              "answer": "the neighbor hearing the mailman",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mailman's involvement?",
              "answer": "the mother scolded the child",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mailman",
              "is_middle_entity": false
            }
          ],
          "neighbor": [
            {
              "question": "What did the neighbor do?",
              "answer": "heard the mailman",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "neighbor",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the neighbor?",
              "answer": "the mailman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "neighbor",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "neighbor",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the neighbor do?",
              "answer": "called the mother",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "neighbor",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the neighbor's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "neighbor",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the neighbor's involvement?",
              "answer": "the mailman called the mother",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "neighbor",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_7",
        "sentence": "The rabbit that the fox that the wolf that the bear that the hunter that the park ranger that the sheriff saw tracked startled growled at followed spotted hopped.",
        "structure": [
          {
            "subject": "rabbit",
            "action": "hopped",
            "object": null
          },
          {
            "subject": "fox",
            "action": "spotted",
            "object": "rabbit"
          },
          {
            "subject": "wolf",
            "action": "followed",
            "object": "fox"
          },
          {
            "subject": "bear",
            "action": "growled at",
            "object": "wolf"
          },
          {
            "subject": "hunter",
            "action": "startled",
            "object": "bear"
          },
          {
            "subject": "park ranger",
            "action": "tracked",
            "object": "hunter"
          },
          {
            "subject": "sheriff",
            "action": "saw",
            "object": "park ranger"
          }
        ],
        "middle_entity": "bear",
        "all_entities": [
          "rabbit",
          "sheriff",
          "fox",
          "bear",
          "park ranger",
          "hunter",
          "wolf"
        ],
        "questions_by_entity": {
          "rabbit": [
            {
              "question": "What did the rabbit do?",
              "answer": "hop",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What spotted the rabbit?",
              "answer": "the fox",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was spotted do?",
              "answer": "hopped",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the rabbit's action?",
              "answer": "the sheriff seeing the park ranger which led to the park ranger tracking the hunter which led to the hunter startling the bear which led to the bear growling at the wolf which led to the wolf following the fox which led to the fox spotting the rabbit",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the rabbit's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "rabbit",
              "is_middle_entity": false
            }
          ],
          "sheriff": [
            {
              "question": "What did the sheriff do?",
              "answer": "see the park ranger",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "sheriff",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the sheriff?",
              "answer": "the park ranger",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "sheriff",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "sheriff",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the sheriff do?",
              "answer": "tracked the hunter",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "sheriff",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the sheriff's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "sheriff",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the sheriff's involvement?",
              "answer": "the park ranger tracked the hunter",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "sheriff",
              "is_middle_entity": false
            }
          ],
          "fox": [
            {
              "question": "What did the fox do?",
              "answer": "spot the rabbit",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What followed the fox?",
              "answer": "the wolf",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was followed do?",
              "answer": "spotted the rabbit",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the fox's action?",
              "answer": "the sheriff seeing the park ranger which led to the park ranger tracking the hunter which led to the hunter startling the bear which led to the bear growling at the wolf which led to the wolf following the fox",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the fox's involvement?",
              "answer": "the rabbit hopped",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": false
            }
          ],
          "bear": [
            {
              "question": "What did the bear do?",
              "answer": "growl at the wolf",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": true
            },
            {
              "question": "Who startled the bear?",
              "answer": "the hunter",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "growled at the wolf",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the bear's action?",
              "answer": "the sheriff seeing the park ranger which led to the park ranger tracking the hunter which led to the hunter startling the bear",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the bear's involvement?",
              "answer": "the wolf followed the fox",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": true
            }
          ],
          "park ranger": [
            {
              "question": "What did the park ranger do?",
              "answer": "track the hunter",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "Who saw the park ranger?",
              "answer": "the sheriff",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "tracked the hunter",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the park ranger's action?",
              "answer": "the sheriff seeing the park ranger",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the park ranger's involvement?",
              "answer": "the hunter startled the bear",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "park ranger",
              "is_middle_entity": false
            }
          ],
          "hunter": [
            {
              "question": "What did the hunter do?",
              "answer": "startle the bear",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "Who tracked the hunter?",
              "answer": "the park ranger",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was tracked do?",
              "answer": "startled the bear",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the hunter's action?",
              "answer": "the sheriff seeing the park ranger which led to the park ranger tracking the hunter",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the hunter's involvement?",
              "answer": "the bear growled at the wolf",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            }
          ],
          "wolf": [
            {
              "question": "What did the wolf do?",
              "answer": "follow the fox",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What growled at the wolf?",
              "answer": "the bear",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was growled at do?",
              "answer": "followed the fox",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the wolf's action?",
              "answer": "the sheriff seeing the park ranger which led to the park ranger tracking the hunter which led to the hunter startling the bear which led to the bear growling at the wolf",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the wolf's involvement?",
              "answer": "the fox spotted the rabbit",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_8",
        "sentence": "The goldfish that the cat that the dog that the boy that the father that the plumber that the homeowner noticed greeted helped walked played with pawed at swam.",
        "structure": [
          {
            "subject": "goldfish",
            "action": "swam",
            "object": null
          },
          {
            "subject": "cat",
            "action": "pawed at",
            "object": "goldfish"
          },
          {
            "subject": "dog",
            "action": "with",
            "object": "cat"
          },
          {
            "subject": "boy",
            "action": "played",
            "object": "dog"
          },
          {
            "subject": "father",
            "action": "walked",
            "object": "boy"
          },
          {
            "subject": "plumber",
            "action": "helped",
            "object": "father"
          },
          {
            "subject": "homeowner",
            "action": "greeted",
            "object": "plumber"
          }
        ],
        "middle_entity": "boy",
        "all_entities": [
          "dog",
          "plumber",
          "father",
          "homeowner",
          "cat",
          "goldfish",
          "boy"
        ],
        "questions_by_entity": {
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "played with the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "Who played the dog?",
              "answer": "the boy",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was walked do?",
              "answer": "played with the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the homeowner noticing the plumber which led to the plumber greeting the father which led to the father helping the boy which led to the boy walking the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat pawed at the goldfish",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ],
          "plumber": [
            {
              "question": "What did the plumber do?",
              "answer": "greeted the father",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "plumber",
              "is_middle_entity": false
            },
            {
              "question": "Who noticed the plumber?",
              "answer": "the homeowner",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "plumber",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "plumber",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was noticed do?",
              "answer": " greeted the father",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "plumber",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the plumber's action?",
              "answer": "the homeowner noticing the plumber",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "plumber",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the plumber's involvement?",
              "answer": "the father helped the boy",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "plumber",
              "is_middle_entity": false
            }
          ],
          "father": [
            {
              "question": "What did the father do?",
              "answer": "helped the boy",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "father",
              "is_middle_entity": false
            },
            {
              "question": "Who greeted the father?",
              "answer": "the plumber",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "father",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "father",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was greeted do?",
              "answer": "helped the boy",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "father",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the father's action?",
              "answer": "the homeowner noticing the plumber which led to the plumber greeting the father",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "father",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the father's involvement?",
              "answer": "the boy walked the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "father",
              "is_middle_entity": false
            }
          ],
          "homeowner": [
            {
              "question": "What did the homeowner do?",
              "answer": "notice the plumber",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "homeowner",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the homeowner?",
              "answer": "the plumber",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "homeowner",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "homeowner",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the homeowner do?",
              "answer": "greeted the father",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "homeowner",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the homeowner's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "homeowner",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the homeowner's involvement?",
              "answer": "the plumber greeted the father",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "homeowner",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "paw at the goldfish",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What played with the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was played with do?",
              "answer": "pawed at the goldfish",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the homeowner noticing the plumber which led to the plumber greeting the father which led to the father helping the boy which led to the boy walking the dog which led to the dog playing with the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the goldfish swam",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "goldfish": [
            {
              "question": "What did the goldfish do?",
              "answer": "swim",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "What pawed at the goldfish?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was pawed at do?",
              "answer": "swam",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the goldfish's action?",
              "answer": "the homeowner noticing the plumber which led to the plumber greeting the father which led to the father helping the boy which led to the boy walking the dog which led to the dog playing with the cat which led to the cat pawing at the goldfish",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "goldfish",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the goldfish's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "goldfish",
              "is_middle_entity": false
            }
          ],
          "boy": [
            {
              "question": "What did the boy do?",
              "answer": "walked the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "Who helped the boy?",
              "answer": "the father",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was helped do?",
              "answer": "walked the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the boy's action?",
              "answer": "the homeowner noticing the plumber which led to the plumber greeting the father which led to the father helping the boy",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the boy's involvement?",
              "answer": "the dog with the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_9",
        "sentence": "The caterpillar that the bird that the cat that the dog that the girl that the teacher that the principal observed instructed walked barked at startled observed transformed.",
        "structure": [
          {
            "subject": "caterpillar",
            "action": "transformed",
            "object": null
          },
          {
            "subject": "bird",
            "action": "observed",
            "object": "caterpillar"
          },
          {
            "subject": "cat",
            "action": "startled",
            "object": "bird"
          },
          {
            "subject": "dog",
            "action": "barked at",
            "object": "cat"
          },
          {
            "subject": "girl",
            "action": "walked",
            "object": "dog"
          },
          {
            "subject": "teacher",
            "action": "instructed",
            "object": "girl"
          },
          {
            "subject": "principal",
            "action": "observed",
            "object": "teacher"
          }
        ],
        "middle_entity": "dog",
        "all_entities": [
          "caterpillar",
          "dog",
          "principal",
          "girl",
          "teacher",
          "bird",
          "cat"
        ],
        "questions_by_entity": {
          "caterpillar": [
            {
              "question": "What did the caterpillar do?",
              "answer": "transform",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "caterpillar",
              "is_middle_entity": false
            },
            {
              "question": "What observed the caterpillar?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "caterpillar",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "caterpillar",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was observed do?",
              "answer": "transformed",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "caterpillar",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the caterpillar's action?",
              "answer": "the principal observing the teacher which led to the teacher instructing the girl which led to the girl walking the dog which led to the dog barking at the cat which led to the cat startling the bird which led to the bird observing the caterpillar",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "caterpillar",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the caterpillar's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "caterpillar",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "bark at the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "Who walked the dog?",
              "answer": "the girl",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was walked do?",
              "answer": "barked at the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the principal observing the teacher which led to the teacher instructing the girl which led to the girl walking the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat startled the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            }
          ],
          "principal": [
            {
              "question": "What did the principal do?",
              "answer": "observe the teacher",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the principal?",
              "answer": "the teacher",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the principal do?",
              "answer": "instructed the girl",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the principal's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the principal's involvement?",
              "answer": "the teacher instructed the girl",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "principal",
              "is_middle_entity": false
            }
          ],
          "girl": [
            {
              "question": "What did the girl do?",
              "answer": "walk the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "Who instructed the girl?",
              "answer": "the teacher",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was instructed do?",
              "answer": "walked the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the girl's action?",
              "answer": "the principal observing the teacher which led to the teacher instructing the girl",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "girl",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the girl's involvement?",
              "answer": "the dog barked at the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "girl",
              "is_middle_entity": false
            }
          ],
          "teacher": [
            {
              "question": "What did the teacher do?",
              "answer": "instruct the girl",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "Who observed the teacher?",
              "answer": "the principal",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was observed do?",
              "answer": "instructed the girl",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the teacher's action?",
              "answer": "the principal observing the teacher",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the teacher's involvement?",
              "answer": "the girl walked the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "teacher",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "observe the caterpillar",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What startled the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "observed the caterpillar",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the principal observing the teacher which led to the teacher instructing the girl which led to the girl walking the dog which led to the dog barking at the cat which led to the cat startling the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the caterpillar transformed",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "startle the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What barked at the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was barked at do?",
              "answer": "startled the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the principal observing the teacher which led to the teacher instructing the girl which led to the girl walking the dog which led to the dog barking at the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird observed the caterpillar",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_10",
        "sentence": "The fly that the spider that the bird that the cat that the dog that the boy that the farmer noticed called chased startled snapped at lunged at buzzed.",
        "structure": [
          {
            "subject": "fly",
            "action": "buzzed",
            "object": null
          },
          {
            "subject": "spider",
            "action": "lunged at",
            "object": "fly"
          },
          {
            "subject": "bird",
            "action": "snapped at",
            "object": "spider"
          },
          {
            "subject": "cat",
            "action": "startled",
            "object": "bird"
          },
          {
            "subject": "dog",
            "action": "chased",
            "object": "cat"
          },
          {
            "subject": "boy",
            "action": "called",
            "object": "dog"
          },
          {
            "subject": "farmer",
            "action": "noticed",
            "object": "boy"
          }
        ],
        "middle_entity": "cat",
        "all_entities": [
          "dog",
          "farmer",
          "spider",
          "bird",
          "cat",
          "boy",
          "fly"
        ],
        "questions_by_entity": {
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "chase the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "Who called the dog?",
              "answer": "the boy",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was called do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the farmer noticing the boy which led to the boy calling the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat startled the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ],
          "farmer": [
            {
              "question": "What did the farmer do?",
              "answer": "notice the boy",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the farmer?",
              "answer": "the boy",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the farmer do?",
              "answer": "called the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the farmer's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the farmer's involvement?",
              "answer": "the boy called the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "farmer",
              "is_middle_entity": false
            }
          ],
          "spider": [
            {
              "question": "What did the spider do?",
              "answer": "lung at the fly",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What snapped at the spider?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was snapped at do?",
              "answer": "lunged at the fly",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the spider's action?",
              "answer": "the farmer noticing the boy which led to the boy calling the dog which led to the dog chasing the cat which led to the cat startling the bird which led to the bird snapping at the spider",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the spider's involvement?",
              "answer": "the fly buzzed",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "snap at the spider",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What startled the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "snapped at the spider",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the farmer noticing the boy which led to the boy calling the dog which led to the dog chasing the cat which led to the cat startling the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the spider lunged at the fly",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "startle the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What chased the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "startled the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the farmer noticing the boy which led to the boy calling the dog which led to the dog chasing the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird snapped at the spider",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": true
            }
          ],
          "boy": [
            {
              "question": "What did the boy do?",
              "answer": "call the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "Who noticed the boy?",
              "answer": "the farmer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was noticed do?",
              "answer": "called the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the boy's action?",
              "answer": "the farmer noticing the boy",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the boy's involvement?",
              "answer": "the dog chased the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": false
            }
          ],
          "fly": [
            {
              "question": "What did the fly do?",
              "answer": "buzz",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What lunged at the fly?",
              "answer": "the spider",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was lunged at do?",
              "answer": "buzzed",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the fly's action?",
              "answer": "the farmer noticing the boy which led to the boy calling the dog which led to the dog chasing the cat which led to the cat startling the bird which led to the bird snapping at the spider which led to the spider lunging at the fly",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the fly's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fly",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_11",
        "sentence": "The squirrel that the cat that the dog that the boy that the mother that the mailman that the mayor greeted waved at scolded called followed hissed at climbed the tree.",
        "structure": [
          {
            "subject": "squirrel",
            "action": "tree",
            "object": null
          },
          {
            "subject": "cat",
            "action": "climbed",
            "object": "squirrel"
          },
          {
            "subject": "dog",
            "action": "hissed at",
            "object": "cat"
          },
          {
            "subject": "boy",
            "action": "followed",
            "object": "dog"
          },
          {
            "subject": "mother",
            "action": "called",
            "object": "boy"
          },
          {
            "subject": "mailman",
            "action": "scolded",
            "object": "mother"
          },
          {
            "subject": "mayor",
            "action": "waved at",
            "object": "mailman"
          }
        ],
        "middle_entity": "boy",
        "all_entities": [
          "mailman",
          "dog",
          "squirrel",
          "mother",
          "mayor",
          "cat",
          "boy"
        ],
        "questions_by_entity": {
          "mailman": [
            {
              "question": "What did the mailman do?",
              "answer": "wave at the mother",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "Who greeted the mailman?",
              "answer": "the mayor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was greeted do?",
              "answer": "waved at the mother",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mailman's action?",
              "answer": "the mayor greeted the mailman",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mailman's involvement?",
              "answer": "the mother scolded the boy",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mailman",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "followed the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "Who called the dog?",
              "answer": "the boy",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was called do?",
              "answer": "followed the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the mayor greeting the mailman which led to the mailman waving at the mother which led to the mother scolding the boy which led to the boy calling the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat hissed at the squirrel",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ],
          "squirrel": [
            {
              "question": "What did the squirrel do?",
              "answer": "climb the tree",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "What hissed at the squirrel?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was hissed at do?",
              "answer": "climbed the tree",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the squirrel's action?",
              "answer": "the mayor greeting the mailman which led to the mailman waving at the mother which led to the mother scolding the boy which led to the boy calling the dog which led to the dog following the cat which led to the cat hissing at the squirrel",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "squirrel",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the squirrel's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "squirrel",
              "is_middle_entity": false
            }
          ],
          "mother": [
            {
              "question": "What did the mother do?",
              "answer": "scold the boy",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "Who waved at the mother?",
              "answer": "the mailman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was waved at do?",
              "answer": "scolded the boy",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mother's action?",
              "answer": "the mayor greeting the mailman which led to the mailman waving at the mother",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mother's involvement?",
              "answer": "the boy called the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mother",
              "is_middle_entity": false
            }
          ],
          "mayor": [
            {
              "question": "What did the mayor do?",
              "answer": "greeted the mailman",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the mayor?",
              "answer": "the mailman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the mayor do?",
              "answer": "waved at the mother",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mayor's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mayor's involvement?",
              "answer": "the mailman waved at the mother",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mayor",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "hissed at the squirrel",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What followed the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was followed do?",
              "answer": "hissed at the squirrel",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the mayor greeting the mailman which led to the mailman waving at the mother which led to the mother scolding the boy which led to the boy calling the dog which led to the dog following the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the squirrel climbed the tree",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "boy": [
            {
              "question": "What did the boy do?",
              "answer": "call the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "Who scolded the boy?",
              "answer": "the mother",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scolded do?",
              "answer": "called the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the boy's action?",
              "answer": "the mayor greeting the mailman which led to the mailman waving at the mother which led to the mother scolding the boy",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the boy's involvement?",
              "answer": "the dog followed the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": true
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_12",
        "sentence": "The moth that the bat that the owl that the eagle that the falconer that the biologist that the researcher observed recorded monitored tracked followed chased fluttered.",
        "structure": [
          {
            "subject": "moth",
            "action": "fluttered",
            "object": null
          },
          {
            "subject": "bat",
            "action": "chased",
            "object": "moth"
          },
          {
            "subject": "owl",
            "action": "followed",
            "object": "bat"
          },
          {
            "subject": "eagle",
            "action": "tracked",
            "object": "owl"
          },
          {
            "subject": "falconer",
            "action": "monitored",
            "object": "eagle"
          },
          {
            "subject": "biologist",
            "action": "recorded",
            "object": "falconer"
          },
          {
            "subject": "researcher",
            "action": "observed",
            "object": "biologist"
          }
        ],
        "middle_entity": "eagle",
        "all_entities": [
          "owl",
          "bat",
          "eagle",
          "falconer",
          "moth",
          "researcher",
          "biologist"
        ],
        "questions_by_entity": {
          "owl": [
            {
              "question": "What did the owl do?",
              "answer": "follow the bat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "owl",
              "is_middle_entity": false
            },
            {
              "question": "What tracked the owl?",
              "answer": "the eagle",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "owl",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "owl",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was tracked do?",
              "answer": "followed the bat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "owl",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the owl's action?",
              "answer": "the researcher observing the biologist which led to the biologist recording the falconer which led to the falconer monitoring the eagle which led to the eagle tracking the owl",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "owl",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the owl's involvement?",
              "answer": "the bat chased the moth",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "owl",
              "is_middle_entity": false
            }
          ],
          "bat": [
            {
              "question": "What did the bat do?",
              "answer": "chase the moth",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bat",
              "is_middle_entity": false
            },
            {
              "question": "What followed the bat?",
              "answer": "the owl",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was followed do?",
              "answer": "chased the moth",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bat's action?",
              "answer": "the researcher observing the biologist which led to the biologist recording the falconer which led to the falconer monitoring the eagle which led to the eagle tracking the owl which led to the owl following the bat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bat's involvement?",
              "answer": "the moth fluttered",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bat",
              "is_middle_entity": false
            }
          ],
          "eagle": [
            {
              "question": "What did the eagle do?",
              "answer": "track the owl",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "eagle",
              "is_middle_entity": true
            },
            {
              "question": "Who monitored the eagle?",
              "answer": "the falconer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "eagle",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "eagle",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was monitored do?",
              "answer": "tracked the owl",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "eagle",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the eagle's action?",
              "answer": "the researcher observing the biologist which led to the biologist recording the falconer which led to the falconer monitoring the eagle",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "eagle",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the eagle's involvement?",
              "answer": "the owl followed the bat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "eagle",
              "is_middle_entity": true
            }
          ],
          "falconer": [
            {
              "question": "What did the falconer do?",
              "answer": "monitor the eagle",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "falconer",
              "is_middle_entity": false
            },
            {
              "question": "Who recorded the falconer?",
              "answer": "the biologist",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "falconer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "falconer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was recorded do?",
              "answer": "monitored the eagle",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "falconer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the falconer's action?",
              "answer": "the researcher observing the biologist which led to the biologist recording the falconer",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "falconer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the falconer's involvement?",
              "answer": "the eagle tracked the owl",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "falconer",
              "is_middle_entity": false
            }
          ],
          "moth": [
            {
              "question": "What did the moth do?",
              "answer": "flutter",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "moth",
              "is_middle_entity": false
            },
            {
              "question": "What chased the moth?",
              "answer": "the bat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "moth",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "moth",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "fluttered",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "moth",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the moth's action?",
              "answer": "the researcher observing the biologist which led to the biologist recording the falconer which led to the falconer monitoring the eagle which led to the eagle tracking the owl which led to the owl following the bat which led to the bat chasing the moth",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "moth",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the moth's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "moth",
              "is_middle_entity": false
            }
          ],
          "researcher": [
            {
              "question": "What did the researcher do?",
              "answer": "observe the biologist",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "researcher",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the researcher?",
              "answer": "the biologist",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "researcher",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "researcher",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the researcher do?",
              "answer": "recorded the falconer",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "researcher",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the researcher's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "researcher",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the researcher's involvement?",
              "answer": "the biologist recorded the falconer",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "researcher",
              "is_middle_entity": false
            }
          ],
          "biologist": [
            {
              "question": "What did the biologist do?",
              "answer": "record the falconer",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "biologist",
              "is_middle_entity": false
            },
            {
              "question": "Who observed the biologist?",
              "answer": "the researcher",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "biologist",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "biologist",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was observed do?",
              "answer": "recorded the falconer",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "biologist",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the biologist's action?",
              "answer": "the researcher observing the biologist",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "biologist",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the biologist's involvement?",
              "answer": "the falconer monitored the eagle",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "biologist",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_13",
        "sentence": "The ant that the spider that the bird that the fox that the wolf that the bear that the hunter saw followed startled chased snapped at lunged at ran away.",
        "structure": [
          {
            "subject": "ant",
            "action": "ran away",
            "object": null
          },
          {
            "subject": "spider",
            "action": "lunged at",
            "object": "ant"
          },
          {
            "subject": "bird",
            "action": "snapped at",
            "object": "spider"
          },
          {
            "subject": "fox",
            "action": "chased",
            "object": "bird"
          },
          {
            "subject": "wolf",
            "action": "startled",
            "object": "fox"
          },
          {
            "subject": "bear",
            "action": "followed",
            "object": "wolf"
          },
          {
            "subject": "hunter",
            "action": "saw",
            "object": "bear"
          }
        ],
        "middle_entity": "fox",
        "all_entities": [
          "ant",
          "fox",
          "bear",
          "spider",
          "bird",
          "hunter",
          "wolf"
        ],
        "questions_by_entity": {
          "ant": [
            {
              "question": "What did the ant do?",
              "answer": "run away",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "What lunged at the ant?",
              "answer": "the spider",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was lunged at do?",
              "answer": "ran away",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the ant's action?",
              "answer": "the hunter seeing the bear which led to the bear following the wolf which led to the wolf startling the fox which led to the fox chasing the bird which led to the bird snapping at the spider which led to the spider lunging at the ant",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the ant's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "ant",
              "is_middle_entity": false
            }
          ],
          "fox": [
            {
              "question": "What did the fox do?",
              "answer": "chase the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What startled the fox?",
              "answer": "the wolf",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "chased the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the fox's action?",
              "answer": "the hunter seeing the bear which led to the bear following the wolf which led to the wolf startling the fox",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the fox's involvement?",
              "answer": "the bird snapped at the spider",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": true
            }
          ],
          "bear": [
            {
              "question": "What did the bear do?",
              "answer": "follow the wolf",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "Who saw the bear?",
              "answer": "the hunter",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "followed the wolf",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bear's action?",
              "answer": "the hunter seeing the bear",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bear's involvement?",
              "answer": "the wolf startled the fox",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": false
            }
          ],
          "spider": [
            {
              "question": "What did the spider do?",
              "answer": "lung at the ant",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What snapped at the spider?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was snapped at do?",
              "answer": "lunged at the ant",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the spider's action?",
              "answer": "the hunter seeing the bear which led to the bear following the wolf which led to the wolf startling the fox which led to the fox chasing the bird which led to the bird snapping at the spider",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the spider's involvement?",
              "answer": "the ant ran away",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "spider",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "snap at the spider",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What chased the bird?",
              "answer": "the fox",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "snapped at the spider",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the hunter seeing the bear which led to the bear following the wolf which led to the wolf startling the fox which led to the fox chasing the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the spider lunged at the ant",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "hunter": [
            {
              "question": "What did the hunter do?",
              "answer": "see the bear",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the hunter?",
              "answer": "the bear",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the hunter do?",
              "answer": "followed the wolf",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the hunter's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the hunter's involvement?",
              "answer": "the bear followed the wolf",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "hunter",
              "is_middle_entity": false
            }
          ],
          "wolf": [
            {
              "question": "What did the wolf do?",
              "answer": "startle the fox",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What followed the wolf?",
              "answer": "the bear",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was followed do?",
              "answer": "startled the fox",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the wolf's action?",
              "answer": "the hunter seeing the bear which led to the bear following the wolf",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the wolf's involvement?",
              "answer": "the fox chased the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_14",
        "sentence": "The lamb that the wolf that the bear that the lion that the zookeeper that the veterinarian that the scientist observed examined monitored tracked startled chased ran away.",
        "structure": [
          {
            "subject": "lamb",
            "action": "ran away",
            "object": null
          },
          {
            "subject": "wolf",
            "action": "chased",
            "object": "lamb"
          },
          {
            "subject": "bear",
            "action": "startled",
            "object": "wolf"
          },
          {
            "subject": "lion",
            "action": "tracked",
            "object": "bear"
          },
          {
            "subject": "zookeeper",
            "action": "monitored",
            "object": "lion"
          },
          {
            "subject": "veterinarian",
            "action": "examined",
            "object": "zookeeper"
          },
          {
            "subject": "scientist",
            "action": "observed",
            "object": "veterinarian"
          }
        ],
        "middle_entity": "lion",
        "all_entities": [
          "lion",
          "scientist",
          "zookeeper",
          "bear",
          "lamb",
          "veterinarian",
          "wolf"
        ],
        "questions_by_entity": {
          "lion": [
            {
              "question": "What did the lion do?",
              "answer": "track the bear",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "lion",
              "is_middle_entity": true
            },
            {
              "question": "Who monitored the lion?",
              "answer": "the zookeeper",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "lion",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "lion",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was monitored do?",
              "answer": "tracked the bear",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "lion",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the lion's action?",
              "answer": "the scientist observing the veterinarian which led to the veterinarian examining the zookeeper which led to the zookeeper monitoring the lion",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "lion",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the lion's involvement?",
              "answer": "the bear startled the wolf",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "lion",
              "is_middle_entity": true
            }
          ],
          "scientist": [
            {
              "question": "What did the scientist do?",
              "answer": "observe the veterinarian",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "scientist",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the scientist?",
              "answer": "the veterinarian",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "scientist",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "scientist",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the scientist do?",
              "answer": "examined the zookeeper",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "scientist",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the scientist's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "scientist",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the scientist's involvement?",
              "answer": "the veterinarian examined the zookeeper",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "scientist",
              "is_middle_entity": false
            }
          ],
          "zookeeper": [
            {
              "question": "What did the zookeeper do?",
              "answer": "monitor the lion",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "Who examined the zookeeper?",
              "answer": "the veterinarian",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was examined do?",
              "answer": "monitored the lion",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the zookeeper's action?",
              "answer": "the scientist observing the veterinarian which led to the veterinarian examining the zookeeper",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "zookeeper",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the zookeeper's involvement?",
              "answer": "the lion tracked the bear",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "zookeeper",
              "is_middle_entity": false
            }
          ],
          "bear": [
            {
              "question": "What did the bear do?",
              "answer": "startle the wolf",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What tracked the bear?",
              "answer": "the lion",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was tracked do?",
              "answer": "startled the wolf",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bear's action?",
              "answer": "the scientist observing the veterinarian which led to the veterinarian examining the zookeeper which led to the zookeeper monitoring the lion which led to the lion tracking the bear",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bear's involvement?",
              "answer": "the wolf chased the lamb",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bear",
              "is_middle_entity": false
            }
          ],
          "lamb": [
            {
              "question": "What did the lamb do?",
              "answer": "run away",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "lamb",
              "is_middle_entity": false
            },
            {
              "question": "What chased the lamb?",
              "answer": "the wolf",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "lamb",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "lamb",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "ran away",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "lamb",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the lamb's action?",
              "answer": "the scientist observing the veterinarian which led to the veterinarian examining the zookeeper which led to the zookeeper monitoring the lion which led to the lion tracking the bear which led to the bear startling the wolf which led to the wolf chasing the lamb",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "lamb",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the lamb's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "lamb",
              "is_middle_entity": false
            }
          ],
          "veterinarian": [
            {
              "question": "What did the veterinarian do?",
              "answer": "examine the zookeeper",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "veterinarian",
              "is_middle_entity": false
            },
            {
              "question": "Who observed the veterinarian?",
              "answer": "the scientist",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "veterinarian",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "veterinarian",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was observed do?",
              "answer": "examined the zookeeper",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "veterinarian",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the veterinarian's action?",
              "answer": "the scientist observing the veterinarian",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "veterinarian",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the veterinarian's involvement?",
              "answer": "the zookeeper monitored the lion",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "veterinarian",
              "is_middle_entity": false
            }
          ],
          "wolf": [
            {
              "question": "What did the wolf do?",
              "answer": "chase the lamb",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What startled the wolf?",
              "answer": "the bear",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "chased the lamb",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the wolf's action?",
              "answer": "the scientist observing the veterinarian which led to the veterinarian examining the zookeeper which led to the zookeeper monitoring the lion which led to the lion tracking the bear which led to the bear startling the wolf",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the wolf's involvement?",
              "answer": "the lamb ran away",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "wolf",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_15",
        "sentence": "The cricket that the frog that the snake that the hawk that the eagle that the biologist that the naturalist noticed studied monitored tracked startled jumped at chirped.",
        "structure": [
          {
            "subject": "cricket",
            "action": "chirped",
            "object": null
          },
          {
            "subject": "frog",
            "action": "jumped at",
            "object": "cricket"
          },
          {
            "subject": "snake",
            "action": "startled",
            "object": "frog"
          },
          {
            "subject": "hawk",
            "action": "tracked",
            "object": "snake"
          },
          {
            "subject": "eagle",
            "action": "monitored",
            "object": "hawk"
          },
          {
            "subject": "biologist",
            "action": "studied",
            "object": "eagle"
          },
          {
            "subject": "naturalist",
            "action": "noticed",
            "object": "biologist"
          }
        ],
        "middle_entity": "hawk",
        "all_entities": [
          "naturalist",
          "frog",
          "eagle",
          "snake",
          "hawk",
          "biologist",
          "cricket"
        ],
        "questions_by_entity": {
          "naturalist": [
            {
              "question": "What did the naturalist do?",
              "answer": "notice the biologist",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "naturalist",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the naturalist?",
              "answer": "the biologist",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "naturalist",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "naturalist",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the naturalist do?",
              "answer": "studied the eagle",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "naturalist",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the naturalist's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "naturalist",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the naturalist's involvement?",
              "answer": "the biologist studied the eagle",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "naturalist",
              "is_middle_entity": false
            }
          ],
          "frog": [
            {
              "question": "What did the frog do?",
              "answer": "jump at the cricket",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "What startled the frog?",
              "answer": "the snake",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "jumped at the cricket",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the frog's action?",
              "answer": "the naturalist noticing the biologist which led to the biologist studying the eagle which led to the eagle monitoring the hawk which led to the hawk tracking the snake which led to the snake startling the frog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the frog's involvement?",
              "answer": "the cricket chirped",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "frog",
              "is_middle_entity": false
            }
          ],
          "eagle": [
            {
              "question": "What did the eagle do?",
              "answer": "monitor the hawk",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "Who studied the eagle?",
              "answer": "the biologist",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was studied do?",
              "answer": "monitored the hawk",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the eagle's action?",
              "answer": "the naturalist noticing the biologist which led to the biologist studying the eagle",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "eagle",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the eagle's involvement?",
              "answer": "the hawk tracked the snake",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "eagle",
              "is_middle_entity": false
            }
          ],
          "snake": [
            {
              "question": "What did the snake do?",
              "answer": "startle the frog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What tracked the snake?",
              "answer": "the hawk",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was tracked do?",
              "answer": "startled the frog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the snake's action?",
              "answer": "the naturalist noticing the biologist which led to the biologist studying the eagle which led to the eagle monitoring the hawk which led to the hawk tracking the snake",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the snake's involvement?",
              "answer": "the frog jumped at the cricket",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            }
          ],
          "hawk": [
            {
              "question": "What did the hawk do?",
              "answer": "track the snake",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "hawk",
              "is_middle_entity": true
            },
            {
              "question": "What monitored the hawk?",
              "answer": "the eagle",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "hawk",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "hawk",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was monitored do?",
              "answer": "tracked the snake",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "hawk",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the hawk's action?",
              "answer": "the naturalist noticing the biologist which led to the biologist studying the eagle which led to the eagle monitoring the hawk",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "hawk",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the hawk's involvement?",
              "answer": "the snake startled the frog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "hawk",
              "is_middle_entity": true
            }
          ],
          "biologist": [
            {
              "question": "What did the biologist do?",
              "answer": "study the eagle",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "biologist",
              "is_middle_entity": false
            },
            {
              "question": "Who noticed the biologist?",
              "answer": "the naturalist",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "biologist",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "biologist",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was noticed do?",
              "answer": "studied the eagle",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "biologist",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the biologist's action?",
              "answer": "the naturalist noticing the biologist",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "biologist",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the biologist's involvement?",
              "answer": "the eagle monitored the hawk",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "biologist",
              "is_middle_entity": false
            }
          ],
          "cricket": [
            {
              "question": "What did the cricket do?",
              "answer": "chirp",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cricket",
              "is_middle_entity": false
            },
            {
              "question": "What jumped at the cricket?",
              "answer": "the frog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cricket",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cricket",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was jumped at do?",
              "answer": "chirped",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cricket",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cricket's action?",
              "answer": "the naturalist noticing the biologist which led to the biologist studying the eagle which led to the eagle monitoring the hawk which led to the hawk tracking the snake which led to the snake startling the frog which led to the frog jumping at the cricket",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cricket",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cricket's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cricket",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_16",
        "sentence": "The beetle that the bird that the snake that the mongoose that the tiger that the elephant that the ranger observed walked past startled avoided hissed at snapped at burrowed.",
        "structure": [
          {
            "subject": "beetle",
            "action": "burrowed",
            "object": null
          },
          {
            "subject": "bird",
            "action": "snapped at",
            "object": "beetle"
          },
          {
            "subject": "snake",
            "action": "hissed at",
            "object": "bird"
          },
          {
            "subject": "mongoose",
            "action": "avoided",
            "object": "snake"
          },
          {
            "subject": "tiger",
            "action": "startled",
            "object": "mongoose"
          },
          {
            "subject": "elephant",
            "action": "walked past",
            "object": "tiger"
          },
          {
            "subject": "ranger",
            "action": "observed",
            "object": "elephant"
          }
        ],
        "middle_entity": "mongoose",
        "all_entities": [
          "elephant",
          "mongoose",
          "tiger",
          "ranger",
          "beetle",
          "bird",
          "snake"
        ],
        "questions_by_entity": {
          "elephant": [
            {
              "question": "What did the elephant do?",
              "answer": "walk past the tiger",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "elephant",
              "is_middle_entity": false
            },
            {
              "question": "Who observed the elephant?",
              "answer": "the ranger",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "elephant",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "elephant",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was observed do?",
              "answer": "walked past the tiger",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "elephant",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the elephant's action?",
              "answer": "the ranger observing the elephant",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "elephant",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the elephant's involvement?",
              "answer": "the tiger startled the mongoose",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "elephant",
              "is_middle_entity": false
            }
          ],
          "mongoose": [
            {
              "question": "What did the mongoose do?",
              "answer": "avoid the snake",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mongoose",
              "is_middle_entity": true
            },
            {
              "question": "What startled the mongoose?",
              "answer": "the tiger",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mongoose",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mongoose",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "avoided the snake",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mongoose",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the mongoose's action?",
              "answer": "the ranger observing the elephant which led to the elephant walking past the tiger which led to the tiger startling the mongoose",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mongoose",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the mongoose's involvement?",
              "answer": "the snake hissed at the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mongoose",
              "is_middle_entity": true
            }
          ],
          "tiger": [
            {
              "question": "What did the tiger do?",
              "answer": "startle the mongoose",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "tiger",
              "is_middle_entity": false
            },
            {
              "question": "What walked past the tiger?",
              "answer": "the elephant",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "tiger",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "tiger",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was walked past do?",
              "answer": "startled the mongoose",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "tiger",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the tiger's action?",
              "answer": "the ranger observing the elephant which led to the elephant walking past the tiger",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "tiger",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the tiger's involvement?",
              "answer": "the mongoose avoided the snake",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "tiger",
              "is_middle_entity": false
            }
          ],
          "ranger": [
            {
              "question": "What did the ranger do?",
              "answer": "observe the elephant",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "ranger",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the ranger?",
              "answer": "the elephant",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "ranger",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "ranger",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the ranger do?",
              "answer": "walked past the tiger",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "ranger",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the ranger's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "ranger",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the ranger's involvement?",
              "answer": "the elephant walked past the tiger",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "ranger",
              "is_middle_entity": false
            }
          ],
          "beetle": [
            {
              "question": "What did the beetle do?",
              "answer": "burrow",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "What snapped at the beetle?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was snapped at do?",
              "answer": "burrowed",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the beetle's action?",
              "answer": "the ranger observing the elephant which led to the elephant walking past the tiger which led to the tiger startling the mongoose which led to the mongoose avoiding the snake which led to the snake hissing at the bird which led to the bird snapping at the beetle",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the beetle's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "beetle",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "snap at the beetle",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What hissed at the bird?",
              "answer": "the snake",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was hissed at do?",
              "answer": "snapped at the beetle",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the ranger observing the elephant which led to the elephant walking past the tiger which led to the tiger startling the mongoose which led to the mongoose avoiding the snake which led to the snake hissing at the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the beetle burrowed",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "snake": [
            {
              "question": "What did the snake do?",
              "answer": "hiss at the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What avoided the snake?",
              "answer": "the mongoose",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was avoided do?",
              "answer": "hissed at the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the snake's action?",
              "answer": "the ranger observing the elephant which led to the elephant walking past the tiger which led to the tiger startling the mongoose which led to the mongoose avoiding the snake",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the snake's involvement?",
              "answer": "the bird snapped at the beetle",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "snake",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_17",
        "sentence": "The ladybug that the bird that the cat that the child that the mother that the mailman that the neighbor noticed called greeted picked up startled snapped at flew.",
        "structure": [
          {
            "subject": "ladybug",
            "action": "flew",
            "object": null
          },
          {
            "subject": "bird",
            "action": "snapped at",
            "object": "ladybug"
          },
          {
            "subject": "cat",
            "action": "startled",
            "object": "bird"
          },
          {
            "subject": "child",
            "action": "picked up",
            "object": "cat"
          },
          {
            "subject": "mother",
            "action": "greeted",
            "object": "child"
          },
          {
            "subject": "mailman",
            "action": "called",
            "object": "mother"
          },
          {
            "subject": "neighbor",
            "action": "noticed",
            "object": "mailman"
          }
        ],
        "middle_entity": "child",
        "all_entities": [
          "ladybug",
          "mailman",
          "mother",
          "child",
          "bird",
          "cat",
          "neighbor"
        ],
        "questions_by_entity": {
          "ladybug": [
            {
              "question": "What did the ladybug do?",
              "answer": "fly",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "ladybug",
              "is_middle_entity": false
            },
            {
              "question": "What snapped at the ladybug?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "ladybug",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "ladybug",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was snapped at do?",
              "answer": "flew",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "ladybug",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the ladybug's action?",
              "answer": "the neighbor noticing the mailman which led to the mailman calling the mother which led to the mother greeting the child which led to the child picking up the cat which led to the cat startling the bird which led to the bird snapping at the ladybug",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "ladybug",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the ladybug's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "ladybug",
              "is_middle_entity": false
            }
          ],
          "mailman": [
            {
              "question": "What did the mailman do?",
              "answer": "call the mother",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "Who noticed the mailman?",
              "answer": "the neighbor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was noticed do?",
              "answer": "called the mother",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mailman's action?",
              "answer": "the neighbor noticing the mailman",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mailman's involvement?",
              "answer": "the mother greeted the child",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mailman",
              "is_middle_entity": false
            }
          ],
          "mother": [
            {
              "question": "What did the mother do?",
              "answer": "greet the child",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "Who called the mother?",
              "answer": "the mailman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was called do?",
              "answer": "greeted the child",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mother's action?",
              "answer": "the neighbor noticing the mailman which led to the mailman calling the mother",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mother's involvement?",
              "answer": "the child picked up the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mother",
              "is_middle_entity": false
            }
          ],
          "child": [
            {
              "question": "What did the child do?",
              "answer": "pick up the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": true
            },
            {
              "question": "Who greeted the child?",
              "answer": "the mother",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was greeted do?",
              "answer": "picked up the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the child's action?",
              "answer": "the neighbor noticing the mailman which led to the mailman calling the mother which led to the mother greeting the child",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the child's involvement?",
              "answer": "the cat startled the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": true
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "snap at the ladybug",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What startled the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "snapped at the ladybug",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the neighbor noticing the mailman which led to the mailman calling the mother which led to the mother greeting the child which led to the child picking up the cat which led to the cat startling the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the ladybug flew",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "startle the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "Who picked up the cat?",
              "answer": "the child",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was picked up do?",
              "answer": "startled the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the neighbor noticing the mailman which led to the mailman calling the mother which led to the mother greeting the child which led to the child picking up the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird snapped at the ladybug",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "neighbor": [
            {
              "question": "What did the neighbor do?",
              "answer": "notice the mailman",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "neighbor",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the neighbor?",
              "answer": "the mailman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "neighbor",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "neighbor",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the neighbor do?",
              "answer": "called the mother",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "neighbor",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the neighbor's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "neighbor",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the neighbor's involvement?",
              "answer": "the mailman called the mother",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "neighbor",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_18",
        "sentence": "The tuna that the shark that the dolphin that the whale that the fisherman that the coast guard that the scientist observed recorded tracked followed swam past chased swam.",
        "structure": [
          {
            "subject": "tuna",
            "action": "swam",
            "object": null
          },
          {
            "subject": "shark",
            "action": "chased",
            "object": "tuna"
          },
          {
            "subject": "dolphin",
            "action": "swam past",
            "object": "shark"
          },
          {
            "subject": "whale",
            "action": "followed",
            "object": "dolphin"
          },
          {
            "subject": "fisherman",
            "action": "tracked",
            "object": "whale"
          },
          {
            "subject": "coast guard",
            "action": "recorded",
            "object": "fisherman"
          },
          {
            "subject": "scientist",
            "action": "observed",
            "object": "coast guard"
          }
        ],
        "middle_entity": "whale",
        "all_entities": [
          "whale",
          "fisherman",
          "dolphin",
          "tuna",
          "coast guard",
          "shark",
          "scientist"
        ],
        "questions_by_entity": {
          "whale": [
            {
              "question": "What did the whale do?",
              "answer": "follow the dolphin",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "whale",
              "is_middle_entity": true
            },
            {
              "question": "Who tracked the whale?",
              "answer": "the fisherman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "whale",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "whale",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was tracked do?",
              "answer": "followed the dolphin",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "whale",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the whale's action?",
              "answer": "the scientist observing the coast guard which led to the coast guard recording the fisherman which led to the fisherman tracking the whale",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "whale",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the whale's involvement?",
              "answer": "the dolphin swam past the shark",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "whale",
              "is_middle_entity": true
            }
          ],
          "fisherman": [
            {
              "question": "What did the fisherman do?",
              "answer": "track the whale",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fisherman",
              "is_middle_entity": false
            },
            {
              "question": "Who recorded the fisherman?",
              "answer": "the coast guard",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fisherman",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fisherman",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was recorded do?",
              "answer": "tracked the whale",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fisherman",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the fisherman's action?",
              "answer": "the scientist observing the coast guard which led to the coast guard recording the fisherman",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fisherman",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the fisherman's involvement?",
              "answer": "the whale followed the dolphin",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fisherman",
              "is_middle_entity": false
            }
          ],
          "dolphin": [
            {
              "question": "What did the dolphin do?",
              "answer": "swim past the shark",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dolphin",
              "is_middle_entity": false
            },
            {
              "question": "What followed the dolphin?",
              "answer": "the whale",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dolphin",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dolphin",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was followed do?",
              "answer": "swam past the shark",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dolphin",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dolphin's action?",
              "answer": "the scientist observing the coast guard which led to the coast guard recording the fisherman which led to the fisherman tracking the whale which led to the whale following the dolphin",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dolphin",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dolphin's involvement?",
              "answer": "the shark chased the tuna",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dolphin",
              "is_middle_entity": false
            }
          ],
          "tuna": [
            {
              "question": "What did the tuna do?",
              "answer": "swim",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "tuna",
              "is_middle_entity": false
            },
            {
              "question": "What chased the tuna?",
              "answer": "the shark",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "tuna",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "tuna",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "swam",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "tuna",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the tuna's action?",
              "answer": "the scientist observing the coast guard which led to the coast guard recording the fisherman which led to the fisherman tracking the whale which led to the whale following the dolphin which led to the dolphin swimming past the shark which led to the shark chasing the tuna",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "tuna",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the tuna's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "tuna",
              "is_middle_entity": false
            }
          ],
          "coast guard": [
            {
              "question": "What did the coast guard do?",
              "answer": "record the fisherman",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "coast guard",
              "is_middle_entity": false
            },
            {
              "question": "Who observed the coast guard?",
              "answer": "the scientist",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "coast guard",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "coast guard",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was observed do?",
              "answer": "recorded the fisherman",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "coast guard",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the coast guard's action?",
              "answer": "the scientist observing the coast guard",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "coast guard",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the coast guard's involvement?",
              "answer": "the fisherman tracked the whale",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "coast guard",
              "is_middle_entity": false
            }
          ],
          "shark": [
            {
              "question": "What did the shark do?",
              "answer": "chase the tuna",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "What swam past the shark?",
              "answer": "the dolphin",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was swum past do?",
              "answer": "chased the tuna",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the shark's action?",
              "answer": "the scientist observing the coast guard which led to the coast guard recording the fisherman which led to the fisherman tracking the whale which led to the whale following the dolphin which led to the dolphin swimming past the shark",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the shark's involvement?",
              "answer": "the tuna swam",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "shark",
              "is_middle_entity": false
            }
          ],
          "scientist": [
            {
              "question": "What did the scientist do?",
              "answer": "observe the coast guard",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "scientist",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the scientist?",
              "answer": "the coast guard",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "scientist",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "scientist",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the scientist do?",
              "answer": "recorded the fisherman",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "scientist",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the scientist's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "scientist",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the scientist's involvement?",
              "answer": "the coast guard recorded the fisherman",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "scientist",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_19",
        "sentence": "The grasshopper that the bird that the cat that the dog that the boy that the father that the mayor saw greeted scolded pulled away from hissed at startled hopped.",
        "structure": [
          {
            "subject": "grasshopper",
            "action": "hopped",
            "object": null
          },
          {
            "subject": "bird",
            "action": "startled",
            "object": "grasshopper"
          },
          {
            "subject": "cat",
            "action": "hissed at",
            "object": "bird"
          },
          {
            "subject": "dog",
            "action": "pulled away from",
            "object": "cat"
          },
          {
            "subject": "boy",
            "action": "scolded",
            "object": "dog"
          },
          {
            "subject": "father",
            "action": "greeted",
            "object": "boy"
          },
          {
            "subject": "mayor",
            "action": "saw",
            "object": "father"
          }
        ],
        "middle_entity": "dog",
        "all_entities": [
          "grasshopper",
          "bird",
          "cat",
          "dog",
          "boy",
          "father",
          "mayor"
        ],
        "questions_by_entity": {
          "grasshopper": [
            {
              "question": "What did the grasshopper do?",
              "answer": "hop",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "grasshopper",
              "is_middle_entity": false
            },
            {
              "question": "Who startled the grasshopper?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "grasshopper",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "grasshopper",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "hopped",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "grasshopper",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the grasshopper's action?",
              "answer": "the mayor seeing the father which led to the father greeting the boy which led to the boy scolding the dog which led to the dog pulling away from the cat which led to the cat hissing at the bird which led to the bird startling the grasshopper",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "grasshopper",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the grasshopper's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "grasshopper",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "startle the grasshopper",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "Who hissed at the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was hissed at do?",
              "answer": "startled the grasshopper",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the mayor seeing the father which led to the father greeting the boy which led to the boy scolding the dog which led to the dog pulling away from the cat which led to the cat hissing at the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the grasshopper hopped",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "hiss at the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "Who pulled away from the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that pulled away from the cat do?",
              "answer": "pulled away from the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the mayor seeing the father which led to the father greeting the boy which led to the boy scolding the dog which led to the dog pulling away from the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird startled the grasshopper",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "pull away from the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "Who scolded the dog?",
              "answer": "the boy",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was scolded do?",
              "answer": "pulled away from the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the mayor seeing the father which led to the father greeting the boy which led to the boy scolding the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat hissed at the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            }
          ],
          "boy": [
            {
              "question": "What did the boy do?",
              "answer": "scold the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "Who greeted the boy?",
              "answer": "the father",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was greeted do?",
              "answer": "scolded the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the boy's action?",
              "answer": "the mayor seeing the father which led to the father greeting the boy",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the boy's involvement?",
              "answer": "the dog pulled away from the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": false
            }
          ],
          "father": [
            {
              "question": "What did the father do?",
              "answer": "greet the boy",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "father",
              "is_middle_entity": false
            },
            {
              "question": "Who saw the father?",
              "answer": "the mayor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "father",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "father",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "greeted the boy",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "father",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the father's action?",
              "answer": "the mayor seeing the father",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "father",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the father's involvement?",
              "answer": "the boy scolded the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "father",
              "is_middle_entity": false
            }
          ],
          "mayor": [
            {
              "question": "What did the mayor do?",
              "answer": "see the father",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the mayor?",
              "answer": "the father",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the mayor do?",
              "answer": "greeted the boy",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mayor's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mayor's involvement?",
              "answer": "the father greeted the boy",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mayor",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_20",
        "sentence": "The kitten that the dog that the child that the mother that the mailman that the neighbor that the mayor heard greeted thanked hugged smiled at sniffed purred.",
        "structure": [
          {
            "subject": "kitten",
            "action": "purred",
            "object": null
          },
          {
            "subject": "dog",
            "action": "sniffed",
            "object": "kitten"
          },
          {
            "subject": "child",
            "action": "smiled at",
            "object": "dog"
          },
          {
            "subject": "mother",
            "action": "hugged",
            "object": "child"
          },
          {
            "subject": "mailman",
            "action": "thanked",
            "object": "mother"
          },
          {
            "subject": "neighbor",
            "action": "greeted",
            "object": "mailman"
          },
          {
            "subject": "mayor",
            "action": "heard",
            "object": "neighbor"
          }
        ],
        "middle_entity": "mother",
        "all_entities": [
          "mailman",
          "kitten",
          "dog",
          "mother",
          "mayor",
          "child",
          "neighbor"
        ],
        "questions_by_entity": {
          "mailman": [
            {
              "question": "What did the mailman do?",
              "answer": "thank the mother",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "Who greeted the mailman?",
              "answer": "the neighbor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was greeted do?",
              "answer": "thanked the mother",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mailman's action?",
              "answer": "the mayor heading the neighbor which led to the neighbor greeting the mailman",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mailman",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mailman's involvement?",
              "answer": "the mother hugged the child",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mailman",
              "is_middle_entity": false
            }
          ],
          "kitten": [
            {
              "question": "What did the kitten do?",
              "answer": "pur",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "kitten",
              "is_middle_entity": false
            },
            {
              "question": "What sniffed the kitten?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "kitten",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "kitten",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was sniffed do?",
              "answer": "purred",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "kitten",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the kitten's action?",
              "answer": "the mayor hearing the neighbor which led to the neighbor greeting the mailman which led to the mailman thanking the mother which led to the mother hugging the child which led to the child smiling at the dog which led to the dog sniffing the kitten",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "kitten",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the kitten's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "kitten",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "sniff the kitten",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "Who smiled at the dog?",
              "answer": "the child",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was smiled at do?",
              "answer": "sniffed the kitten",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the mayor hearing the neighbor which led to the neighbor greeting the mailman which led to the mailman thanking the mother which led to the mother hugging the child which led to the child smiling at the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the kitten purred",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ],
          "mother": [
            {
              "question": "What did the mother do?",
              "answer": "hug the child",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mother",
              "is_middle_entity": true
            },
            {
              "question": "Who thanked the mother?",
              "answer": "the mailman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mother",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mother",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was thanked do?",
              "answer": "hugged the child",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mother",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the mother's action?",
              "answer": "the mayor hearing the neighbor which led to the neighbor greeting the mailman which led to the mailman thanking the mother",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mother",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the mother's involvement?",
              "answer": "the child smiled at the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mother",
              "is_middle_entity": true
            }
          ],
          "mayor": [
            {
              "question": "What did the mayor do?",
              "answer": "heard the neighbor",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the mayor?",
              "answer": "the neighbor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the mayor do?",
              "answer": "greeted the mailman",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mayor's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mayor's involvement?",
              "answer": "the neighbor greeted the mailman",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mayor",
              "is_middle_entity": false
            }
          ],
          "child": [
            {
              "question": "What did the child do?",
              "answer": "smile at the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "Who hugged the child?",
              "answer": "the mother",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was hugged do?",
              "answer": "smiled at the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the child's action?",
              "answer": "the mayor hearing the neighbor which led to the neighbor greeting the mailman which led to the mailman thanking the mother which led to the mother hugging the child",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the child's involvement?",
              "answer": "the dog sniffed the kitten",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": false
            }
          ],
          "neighbor": [
            {
              "question": "What did the neighbor do?",
              "answer": "greet the mailman",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "neighbor",
              "is_middle_entity": false
            },
            {
              "question": "Who heard the neighbor?",
              "answer": "the mayor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "neighbor",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "neighbor",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was heard do?",
              "answer": "greeted the mailman",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "neighbor",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the neighbor's action?",
              "answer": "the mayor hearing the neighbor",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "neighbor",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the neighbor's involvement?",
              "answer": "the mailman thanked the mother",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "neighbor",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_21",
        "sentence": "The baby bird that the cat that the dog that the child that the mother that the policeman that the mayor heard greeted smiled at called sniffed at stared at chirped.",
        "structure": [
          {
            "subject": "baby bird",
            "action": "chirped",
            "object": null
          },
          {
            "subject": "cat",
            "action": "stared at",
            "object": "baby bird"
          },
          {
            "subject": "dog",
            "action": "sniffed at",
            "object": "cat"
          },
          {
            "subject": "child",
            "action": "called",
            "object": "dog"
          },
          {
            "subject": "mother",
            "action": "smiled at",
            "object": "child"
          },
          {
            "subject": "policeman",
            "action": "greeted",
            "object": "mother"
          },
          {
            "subject": "mayor",
            "action": "heard",
            "object": "policeman"
          }
        ],
        "middle_entity": "child",
        "all_entities": [
          "baby bird",
          "cat",
          "dog",
          "child",
          "mother",
          "policeman",
          "mayor"
        ],
        "questions_by_entity": {
          "baby bird": [
            {
              "question": "What did the baby bird do?",
              "answer": "chirped",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "baby bird",
              "is_middle_entity": false
            },
            {
              "question": "What stared at the baby bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "baby bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "baby bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was stared at do?",
              "answer": "chirped",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "baby bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the baby bird's action?",
              "answer": "the mayor hearing the policeman which led to the policeman greeting the mother which led to the mother smiling at the child which led to the child calling the dog which led to the dog sniffing at the cat which led to the cat staring at the baby bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "baby bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the baby bird's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "baby bird",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "stared at the baby bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What sniffed at the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was sniffed at do?",
              "answer": "stared at the baby bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the mayor hearing the policeman which led to the policeman greeting the mother which led to the mother smiling at the child which led to the child calling the dog which led to the dog sniffing at the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the baby bird chirped",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "sniffed at the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "Who called the dog?",
              "answer": "the child",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was called do?",
              "answer": "sniffed at the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the mayor hearing the policeman which led to the policeman greeting the mother which led to the mother smiling at the child which led to the child calling the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat stared at the baby bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ],
          "child": [
            {
              "question": "What did the child do?",
              "answer": "called the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": true
            },
            {
              "question": "Who smiled at the child?",
              "answer": "the mother",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was smiled at do?",
              "answer": "called the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the child's action?",
              "answer": "the mayor hearing the policeman which led to the policeman greeting the mother which led to the mother smiling at the child",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the child's involvement?",
              "answer": "the dog sniffed at the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": true
            }
          ],
          "mother": [
            {
              "question": "What did the mother do?",
              "answer": "smiled at the child",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "Who greeted the mother?",
              "answer": "the policeman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was greeted do?",
              "answer": "smiled at the child",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mother's action?",
              "answer": "the mayor hearing the policeman which led to the policeman greeting the mother",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mother",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mother's involvement?",
              "answer": "the child called the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mother",
              "is_middle_entity": false
            }
          ],
          "policeman": [
            {
              "question": "What did the policeman do?",
              "answer": "greeted the mother",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "policeman",
              "is_middle_entity": false
            },
            {
              "question": "Who heard the policeman?",
              "answer": "the mayor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "policeman",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "policeman",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was heard do?",
              "answer": "greeted the mother",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "policeman",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the policeman's action?",
              "answer": "the mayor hearing the policeman",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "policeman",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the policeman's involvement?",
              "answer": "the mother smiled at the child",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "policeman",
              "is_middle_entity": false
            }
          ],
          "mayor": [
            {
              "question": "What did the mayor do?",
              "answer": "heard the policeman",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the mayor?",
              "answer": "the policeman",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the mayor do?",
              "answer": "greeted the mother",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mayor's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mayor",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mayor's involvement?",
              "answer": "the policeman greeted the mother",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mayor",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_22",
        "sentence": "The butterfly that the bird that the cat that the dog that the boy that the teacher that the principal observed instructed called chased snapped at startled fluttered.",
        "structure": [
          {
            "subject": "butterfly",
            "action": "fluttered",
            "object": null
          },
          {
            "subject": "bird",
            "action": "startled",
            "object": "butterfly"
          },
          {
            "subject": "cat",
            "action": "snapped at",
            "object": "bird"
          },
          {
            "subject": "dog",
            "action": "chased",
            "object": "cat"
          },
          {
            "subject": "boy",
            "action": "called",
            "object": "dog"
          },
          {
            "subject": "teacher",
            "action": "instructed",
            "object": "boy"
          },
          {
            "subject": "principal",
            "action": "observed",
            "object": "teacher"
          }
        ],
        "middle_entity": "dog",
        "all_entities": [
          "principal",
          "dog",
          "butterfly",
          "teacher",
          "bird",
          "cat",
          "boy"
        ],
        "questions_by_entity": {
          "principal": [
            {
              "question": "What did the principal do?",
              "answer": "observe the teacher",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the principal?",
              "answer": "the teacher",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the principal do?",
              "answer": "instructed the boy",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the principal's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the principal's involvement?",
              "answer": "the teacher instructed the boy",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "principal",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "chase the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "Who called the dog?",
              "answer": "the boy",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was called do?",
              "answer": "chased the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the principal observing the teacher which led to the teacher instructing the boy which led to the boy calling the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat snapped at the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            }
          ],
          "butterfly": [
            {
              "question": "What did the butterfly do?",
              "answer": "flutter",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "What startled the butterfly?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "fluttered",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the butterfly's action?",
              "answer": "the principal observing the teacher which led to the teacher instructing the boy which led to the boy calling the dog which led to the dog chasing the cat which led to the cat snapping at the bird which led to the bird startling the butterfly",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "butterfly",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the butterfly's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "butterfly",
              "is_middle_entity": false
            }
          ],
          "teacher": [
            {
              "question": "What did the teacher do?",
              "answer": "instruct the boy",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "Who observed the teacher?",
              "answer": "the principal",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was observed do?",
              "answer": "instructed the boy",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the teacher's action?",
              "answer": "the principal observing the teacher",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the teacher's involvement?",
              "answer": "the boy called the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "teacher",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "startle the butterfly",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What snapped at the bird?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was snapped at do?",
              "answer": "startled the butterfly",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the principal observing the teacher which led to the teacher instructing the boy which led to the boy calling the dog which led to the dog chasing the cat which led to the cat snapping at the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the butterfly fluttered",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "snap at the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What chased the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "snapped at the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the principal observing the teacher which led to the teacher instructing the boy which led to the boy calling the dog which led to the dog chasing the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the bird startled the butterfly",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ],
          "boy": [
            {
              "question": "What did the boy do?",
              "answer": "call the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "Who instructed the boy?",
              "answer": "the teacher",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was instructed do?",
              "answer": "called the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the boy's action?",
              "answer": "the principal observing the teacher which led to the teacher instructing the boy",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the boy's involvement?",
              "answer": "the dog chased the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "boy",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_23",
        "sentence": "The rabbit that the dog that the child that the mother that the teacher that the principal that the superintendent observed instructed reminded called for looked after startled hopped.",
        "structure": [
          {
            "subject": "rabbit",
            "action": "hopped",
            "object": null
          },
          {
            "subject": "dog",
            "action": "startled",
            "object": "rabbit"
          },
          {
            "subject": "child",
            "action": "looked after",
            "object": "dog"
          },
          {
            "subject": "mother",
            "action": "called for",
            "object": "child"
          },
          {
            "subject": "teacher",
            "action": "reminded",
            "object": "mother"
          },
          {
            "subject": "principal",
            "action": "instructed",
            "object": "teacher"
          },
          {
            "subject": "superintendent",
            "action": "observed",
            "object": "principal"
          }
        ],
        "middle_entity": "mother",
        "all_entities": [
          "rabbit",
          "dog",
          "child",
          "mother",
          "teacher",
          "principal",
          "superintendent"
        ],
        "questions_by_entity": {
          "rabbit": [
            {
              "question": "What did the rabbit do?",
              "answer": "hop",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "Who startled the rabbit?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "hopped",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the rabbit's action?",
              "answer": "the superintendent observing the principal which led to the principal instructing the teacher which led to the teacher reminding the mother which led to the mother calling for the child which led to the child looking after the dog which led to the dog startling the rabbit",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "rabbit",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the rabbit's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "rabbit",
              "is_middle_entity": false
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "startle the rabbit",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "Who looked after the dog?",
              "answer": "the child",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was looked after do?",
              "answer": "startled the rabbit",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the superintendent observing the principal which led to the principal instructing the teacher which led to the teacher reminding the mother which led to the mother calling for the child which led to the child looking after the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the rabbit hopped",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ],
          "child": [
            {
              "question": "What did the child do?",
              "answer": "look after the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "Who called for the child?",
              "answer": "the mother",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was called for do?",
              "answer": "looked after the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the child's action?",
              "answer": "the superintendent observing the principal which led to the principal instructing the teacher which led to the teacher reminding the mother which led to the mother calling for the child",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the child's involvement?",
              "answer": "the dog startled the rabbit",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": false
            }
          ],
          "mother": [
            {
              "question": "What did the mother do?",
              "answer": "call for the child",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mother",
              "is_middle_entity": true
            },
            {
              "question": "Who reminded the mother?",
              "answer": "the teacher",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mother",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mother",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was reminded do?",
              "answer": "called for the child",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mother",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the mother's action?",
              "answer": "the superintendent observing the principal which led to the principal instructing the teacher which led to the teacher reminding the mother",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mother",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the mother's involvement?",
              "answer": "the child looked after the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mother",
              "is_middle_entity": true
            }
          ],
          "teacher": [
            {
              "question": "What did the teacher do?",
              "answer": "remind the mother",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "Who instructed the teacher?",
              "answer": "the principal",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was instructed do?",
              "answer": "reminded the mother",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the teacher's action?",
              "answer": "the superintendent observing the principal which led to the principal instructing the teacher",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "teacher",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the teacher's involvement?",
              "answer": "the mother called for the child",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "teacher",
              "is_middle_entity": false
            }
          ],
          "principal": [
            {
              "question": "What did the principal do?",
              "answer": "instruct the teacher",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "Who observed the principal?",
              "answer": "the superintendent",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was observed do?",
              "answer": "instructed the teacher",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the principal's action?",
              "answer": "the superintendent observing the principal",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "principal",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the principal's involvement?",
              "answer": "the teacher reminded the mother",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "principal",
              "is_middle_entity": false
            }
          ],
          "superintendent": [
            {
              "question": "What did the superintendent do?",
              "answer": "observe the principal",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "superintendent",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the superintendent?",
              "answer": "the principal",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "superintendent",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "superintendent",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the superintendent do?",
              "answer": "instructed the teacher",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "superintendent",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the superintendent's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "superintendent",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the superintendent's involvement?",
              "answer": "the principal instructed the teacher",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "superintendent",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_24",
        "sentence": "The note that the secretary that the manager that the CEO that the investor that the politician that the president scolded questioned instructed pressured criticized dropped fell.",
        "structure": [
          {
            "subject": "note",
            "action": "fell",
            "object": null
          },
          {
            "subject": "secretary",
            "action": "dropped",
            "object": "note"
          },
          {
            "subject": "manager",
            "action": "criticized",
            "object": "secretary"
          },
          {
            "subject": "ceo",
            "action": "pressured",
            "object": "manager"
          },
          {
            "subject": "investor",
            "action": "instructed",
            "object": "ceo"
          },
          {
            "subject": "politician",
            "action": "questioned",
            "object": "investor"
          },
          {
            "subject": "president",
            "action": "scolded",
            "object": "politician"
          }
        ],
        "middle_entity": "ceo",
        "all_entities": [
          "secretary",
          "note",
          "investor",
          "ceo",
          "manager",
          "president",
          "politician"
        ],
        "questions_by_entity": {
          "secretary": [
            {
              "question": "What did the secretary do?",
              "answer": "drop the note",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "secretary",
              "is_middle_entity": false
            },
            {
              "question": "Who criticized the secretary?",
              "answer": "the manager",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "secretary",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "secretary",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was criticized do?",
              "answer": "dropped the note",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "secretary",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the secretary's action?",
              "answer": "the president scolding the politician which led to the politician questioning the investor which led to the investor instructing the ceo which led to the ceo pressuring the manager which led to the manager criticizing the secretary",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "secretary",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the secretary's involvement?",
              "answer": "the note fell",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "secretary",
              "is_middle_entity": false
            }
          ],
          "note": [
            {
              "question": "What did the note do?",
              "answer": "fall",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "note",
              "is_middle_entity": false
            },
            {
              "question": "Who dropped the note?",
              "answer": "the secretary",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "note",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "note",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was dropped do?",
              "answer": "fell",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "note",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the note's action?",
              "answer": "the president scolding the politician which led to the politician questioning the investor which led to the investor instructing the ceo which led to the ceo pressuring the manager which led to the manager criticizing the secretary which led to the secretary dropping the note",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "note",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the note's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "note",
              "is_middle_entity": false
            }
          ],
          "investor": [
            {
              "question": "What did the investor do?",
              "answer": "instruct the ceo",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "investor",
              "is_middle_entity": false
            },
            {
              "question": "Who questioned the investor?",
              "answer": "the politician",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "investor",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "investor",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was questioned do?",
              "answer": "instructed the ceo",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "investor",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the investor's action?",
              "answer": "the president scolding the politician which led to the politician questioning the investor",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "investor",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the investor's involvement?",
              "answer": "the ceo pressured the manager",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "investor",
              "is_middle_entity": false
            }
          ],
          "ceo": [
            {
              "question": "What did the ceo do?",
              "answer": "pressure the manager",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "ceo",
              "is_middle_entity": true
            },
            {
              "question": "Who instructed the ceo?",
              "answer": "the investor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "ceo",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "ceo",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was instructed do?",
              "answer": "pressured the manager",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "ceo",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the ceo's action?",
              "answer": "the president scolding the politician which led to the politician questioning the investor which led to the investor instructing the ceo",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "ceo",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the ceo's involvement?",
              "answer": "the manager criticized the secretary",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "ceo",
              "is_middle_entity": true
            }
          ],
          "manager": [
            {
              "question": "What did the manager do?",
              "answer": "criticize the secretary",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "manager",
              "is_middle_entity": false
            },
            {
              "question": "Who pressured the manager?",
              "answer": "the ceo",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "manager",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "manager",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was pressured do?",
              "answer": "criticized the secretary",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "manager",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the manager's action?",
              "answer": "the president scolding the politician which led to the politician questioning the investor which led to the investor instructing the ceo which led to the ceo pressuring the manager",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "manager",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the manager's involvement?",
              "answer": "the secretary dropped the note",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "manager",
              "is_middle_entity": false
            }
          ],
          "president": [
            {
              "question": "What did the president do?",
              "answer": "scold the politician",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "president",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the president?",
              "answer": "the politician",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "president",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "president",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the president do?",
              "answer": "questioned the investor",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "president",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the president's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "president",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the president's involvement?",
              "answer": "the politician questioned the investor",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "president",
              "is_middle_entity": false
            }
          ],
          "politician": [
            {
              "question": "What did the politician do?",
              "answer": "question the investor",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "politician",
              "is_middle_entity": false
            },
            {
              "question": "Who scolded the politician?",
              "answer": "the president",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "politician",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "politician",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was scolded do?",
              "answer": "questioned the investor",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "politician",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the politician's action?",
              "answer": "the president scolding the politician",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "politician",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the politician's involvement?",
              "answer": "the investor instructed the ceo",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "politician",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_25",
        "sentence": "The pearl that the oyster that the starfish that the crab that the octopus that the shark that the whale nudged startled inked dropped landed on dropped shimmered.",
        "structure": [
          {
            "subject": "pearl",
            "action": "shimmered",
            "object": null
          },
          {
            "subject": "oyster",
            "action": "dropped",
            "object": "pearl"
          },
          {
            "subject": "starfish",
            "action": "landed on",
            "object": "oyster"
          },
          {
            "subject": "crab",
            "action": "dropped",
            "object": "starfish"
          },
          {
            "subject": "octopus",
            "action": "inked",
            "object": "crab"
          },
          {
            "subject": "shark",
            "action": "startled",
            "object": "octopus"
          },
          {
            "subject": "whale",
            "action": "nudged",
            "object": "shark"
          }
        ],
        "middle_entity": "crab",
        "all_entities": [
          "pearl",
          "oyster",
          "starfish",
          "crab",
          "octopus",
          "shark",
          "whale"
        ],
        "questions_by_entity": {
          "pearl": [
            {
              "question": "What did the pearl do?",
              "answer": "shimmered",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "pearl",
              "is_middle_entity": false
            },
            {
              "question": "What dropped the pearl?",
              "answer": "the oyster",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "pearl",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "pearl",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was dropped do?",
              "answer": "shimmered",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "pearl",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the pearl's action?",
              "answer": "the whale nudging the shark which led to the shark startling the octopus which led to the octopus inking the crab which led to the crab dropping the starfish which led to the starfish landing on the oyster which led to the oyster dropping the pearl",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "pearl",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the pearl's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "pearl",
              "is_middle_entity": false
            }
          ],
          "oyster": [
            {
              "question": "What did the oyster do?",
              "answer": "dropped the pearl",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "oyster",
              "is_middle_entity": false
            },
            {
              "question": "What landed on the oyster?",
              "answer": "the starfish",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "oyster",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "oyster",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was landed on do?",
              "answer": "dropped the pearl",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "oyster",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the oyster's action?",
              "answer": "the whale nudging the shark which led to the shark startling the octopus which led to the octopus inking the crab which led to the crab dropping the starfish which led to the starfish landing on the oyster",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "oyster",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the oyster's involvement?",
              "answer": "the pearl shimmered",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "oyster",
              "is_middle_entity": false
            }
          ],
          "starfish": [
            {
              "question": "What did the starfish do?",
              "answer": "landed on the oyster",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "What dropped the starfish?",
              "answer": "the crab",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was dropped do?",
              "answer": "landed on the oyster",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the starfish's action?",
              "answer": "the whale nudging the shark which led to the shark startling the octopus which led to the octopus inking the crab which led to the crab dropping the starfish",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "starfish",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the starfish's involvement?",
              "answer": "the oyster dropped the pearl",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "starfish",
              "is_middle_entity": false
            }
          ],
          "crab": [
            {
              "question": "What did the crab do?",
              "answer": "dropped the starfish",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "crab",
              "is_middle_entity": true
            },
            {
              "question": "What inked the crab?",
              "answer": "the octopus",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "crab",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "crab",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was inked do?",
              "answer": "dropped the starfish",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "crab",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the crab's action?",
              "answer": "the whale nudging the shark which led to the shark startling the octopus which led to the octopus inking the crab",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "crab",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the crab's involvement?",
              "answer": "the starfish landed on the oyster",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "crab",
              "is_middle_entity": true
            }
          ],
          "octopus": [
            {
              "question": "What did the octopus do?",
              "answer": "inked the crab",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "octopus",
              "is_middle_entity": false
            },
            {
              "question": "What startled the octopus?",
              "answer": "the shark",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "octopus",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "octopus",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "inked the crab",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "octopus",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the octopus's action?",
              "answer": "the whale nudging the shark which led to the shark startling the octopus",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "octopus",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the octopus's involvement?",
              "answer": "the crab dropped the starfish",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "octopus",
              "is_middle_entity": false
            }
          ],
          "shark": [
            {
              "question": "What did the shark do?",
              "answer": "startled the octopus",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "What nudged the shark?",
              "answer": "the whale",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was nudged do?",
              "answer": "startled the octopus",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the shark's action?",
              "answer": "the whale nudging the shark",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "shark",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the shark's involvement?",
              "answer": "the octopus inked the crab",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "shark",
              "is_middle_entity": false
            }
          ],
          "whale": [
            {
              "question": "What did the whale do?",
              "answer": "nudged the shark",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "whale",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the whale?",
              "answer": "the shark",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "whale",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "whale",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the whale do?",
              "answer": "startled the octopus",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "whale",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the whale's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "whale",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the whale's involvement?",
              "answer": "the shark startled the octopus",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "whale",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_26",
        "sentence": "The chip that the mouse that the cat that the dog that the horse that the cow that the farmer noticed startled chased kicked nudged dropped slid.",
        "structure": [
          {
            "subject": "chip",
            "action": "slid",
            "object": null
          },
          {
            "subject": "mouse",
            "action": "dropped",
            "object": "chip"
          },
          {
            "subject": "cat",
            "action": "nudged",
            "object": "mouse"
          },
          {
            "subject": "dog",
            "action": "kicked",
            "object": "cat"
          },
          {
            "subject": "horse",
            "action": "chased",
            "object": "dog"
          },
          {
            "subject": "cow",
            "action": "startled",
            "object": "horse"
          },
          {
            "subject": "farmer",
            "action": "noticed",
            "object": "cow"
          }
        ],
        "middle_entity": "dog",
        "all_entities": [
          "dog",
          "farmer",
          "horse",
          "mouse",
          "cow",
          "chip",
          "cat"
        ],
        "questions_by_entity": {
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "kick the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What chased the dog?",
              "answer": "the horse",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "kicked the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the farmer noticing the cow which led to the cow startling the horse which led to the horse chasing the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat nudged the mouse",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": true
            }
          ],
          "farmer": [
            {
              "question": "What did the farmer do?",
              "answer": "notice the cow",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the farmer?",
              "answer": "the cow",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the farmer do?",
              "answer": "startled the horse",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the farmer's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "farmer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the farmer's involvement?",
              "answer": "the cow startled the horse",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "farmer",
              "is_middle_entity": false
            }
          ],
          "horse": [
            {
              "question": "What did the horse do?",
              "answer": "chase the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "horse",
              "is_middle_entity": false
            },
            {
              "question": "What startled the horse?",
              "answer": "the cow",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "horse",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "horse",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "chased the dog",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "horse",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the horse's action?",
              "answer": "the farmer noticing the cow which led to the cow startling the horse",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "horse",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the horse's involvement?",
              "answer": "the dog kicked the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "horse",
              "is_middle_entity": false
            }
          ],
          "mouse": [
            {
              "question": "What did the mouse do?",
              "answer": "drop the chip",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What nudged the mouse?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was nudged do?",
              "answer": "dropped the chip",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mouse's action?",
              "answer": "the farmer noticing the cow which led to the cow startling the horse which led to the horse chasing the dog which led to the dog kicking the cat which led to the cat nudging the mouse",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mouse",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mouse's involvement?",
              "answer": "the chip slid",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mouse",
              "is_middle_entity": false
            }
          ],
          "cow": [
            {
              "question": "What did the cow do?",
              "answer": "startle the horse",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cow",
              "is_middle_entity": false
            },
            {
              "question": "Who noticed the cow?",
              "answer": "the farmer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cow",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cow",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was noticed do?",
              "answer": "startled the horse",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cow",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cow's action?",
              "answer": "the farmer noticing the cow",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cow",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cow's involvement?",
              "answer": "the horse chased the dog",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cow",
              "is_middle_entity": false
            }
          ],
          "chip": [
            {
              "question": "What did the chip do?",
              "answer": "slid",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "chip",
              "is_middle_entity": false
            },
            {
              "question": "What dropped the chip?",
              "answer": "the mouse",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "chip",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "chip",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was dropped do?",
              "answer": "slid",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "chip",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the chip's action?",
              "answer": "the farmer noticing the cow which led to the cow startling the horse which led to the horse chasing the dog which led to the dog kicking the cat which led to the cat nudging the mouse which led to the mouse dropping the chip",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "chip",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the chip's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "chip",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "nudge the mouse",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What kicked the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was kicked do?",
              "answer": "nudged the mouse",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the farmer noticing the cow which led to the cow startling the horse which led to the horse chasing the dog which led to the dog kicking the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the mouse dropped the chip",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_27",
        "sentence": "The message that the programmer that the engineer that the scientist that the professor that the dean that the chancellor called instructed corrected advised reminded forwarded appeared.",
        "structure": [
          {
            "subject": "message",
            "action": "appeared",
            "object": null
          },
          {
            "subject": "programmer",
            "action": "forwarded",
            "object": "message"
          },
          {
            "subject": "engineer",
            "action": "reminded",
            "object": "programmer"
          },
          {
            "subject": "scientist",
            "action": "advised",
            "object": "engineer"
          },
          {
            "subject": "professor",
            "action": "corrected",
            "object": "scientist"
          },
          {
            "subject": "dean",
            "action": "instructed",
            "object": "professor"
          },
          {
            "subject": "chancellor",
            "action": "called",
            "object": "dean"
          }
        ],
        "middle_entity": "scientist",
        "all_entities": [
          "chancellor",
          "message",
          "dean",
          "programmer",
          "scientist",
          "engineer",
          "professor"
        ],
        "questions_by_entity": {
          "chancellor": [
            {
              "question": "What did the chancellor do?",
              "answer": "call the dean",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "chancellor",
              "is_middle_entity": false
            },
            {
              "question": "Who was affected by the chancellor?",
              "answer": "the dean",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "chancellor",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "chancellor",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the chancellor do?",
              "answer": "instructed the professor",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "chancellor",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the chancellor's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "chancellor",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the chancellor's involvement?",
              "answer": "the dean instructed the professor",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "chancellor",
              "is_middle_entity": false
            }
          ],
          "message": [
            {
              "question": "What did the message do?",
              "answer": "appear",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "message",
              "is_middle_entity": false
            },
            {
              "question": "Who forwarded the message?",
              "answer": "the programmer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "message",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "message",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was forwarded do?",
              "answer": "appeared",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "message",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the message's action?",
              "answer": "the chancellor calling the dean which led to the dean instructing the professor which led to the professor correcting the scientist which led to the scientist advising the engineer which led to the engineer reminding the programmer which led to the programmer forwarding the message",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "message",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the message's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "message",
              "is_middle_entity": false
            }
          ],
          "dean": [
            {
              "question": "What did the dean do?",
              "answer": "instruct the professor",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dean",
              "is_middle_entity": false
            },
            {
              "question": "Who called the dean?",
              "answer": "the chancellor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dean",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dean",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was called do?",
              "answer": "instructed the professor",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dean",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dean's action?",
              "answer": "the chancellor calling the dean",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dean",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dean's involvement?",
              "answer": "the professor corrected the scientist",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dean",
              "is_middle_entity": false
            }
          ],
          "programmer": [
            {
              "question": "What did the programmer do?",
              "answer": "forward the message",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "programmer",
              "is_middle_entity": false
            },
            {
              "question": "Who reminded the programmer?",
              "answer": "the engineer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "programmer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "programmer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was reminded do?",
              "answer": "forwarded the message",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "programmer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the programmer's action?",
              "answer": "the chancellor calling the dean which led to the dean instructing the professor which led to the professor correcting the scientist which led to the scientist advising the engineer which led to the engineer reminding the programmer",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "programmer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the programmer's involvement?",
              "answer": "the message appeared",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "programmer",
              "is_middle_entity": false
            }
          ],
          "scientist": [
            {
              "question": "What did the scientist do?",
              "answer": "advise the engineer",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "scientist",
              "is_middle_entity": true
            },
            {
              "question": "Who corrected the scientist?",
              "answer": "the professor",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "scientist",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "scientist",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was corrected do?",
              "answer": "advised the engineer",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "scientist",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the scientist's action?",
              "answer": "the chancellor calling the dean which led to the dean instructing the professor which led to the professor correcting the scientist",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "scientist",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the scientist's involvement?",
              "answer": "the engineer reminded the programmer",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "scientist",
              "is_middle_entity": true
            }
          ],
          "engineer": [
            {
              "question": "What did the engineer do?",
              "answer": "remind the programmer",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "engineer",
              "is_middle_entity": false
            },
            {
              "question": "Who advised the engineer?",
              "answer": "the scientist",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "engineer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "engineer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was advised do?",
              "answer": "reminded the programmer",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "engineer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the engineer's action?",
              "answer": "the chancellor calling the dean which led to the dean instructing the professor which led to the professor correcting the scientist which led to the scientist advising the engineer",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "engineer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the engineer's involvement?",
              "answer": "the programmer forwarded the message",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "engineer",
              "is_middle_entity": false
            }
          ],
          "professor": [
            {
              "question": "What did the professor do?",
              "answer": "correct the scientist",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "professor",
              "is_middle_entity": false
            },
            {
              "question": "Who instructed the professor?",
              "answer": "the dean",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "professor",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "professor",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was instructed do?",
              "answer": "corrected the scientist",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "professor",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the professor's action?",
              "answer": "the chancellor calling the dean which led to the dean instructing the professor",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "professor",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the professor's involvement?",
              "answer": "the scientist advised the engineer",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "professor",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_28",
        "sentence": "The leaf that the ant that the beetle that the rabbit that the fox that the deer that the park ranger spotted startled chased sniffed stepped over carried dropped fluttered.",
        "structure": [
          {
            "subject": "leaf",
            "action": "fluttered",
            "object": null
          },
          {
            "subject": "ant",
            "action": "dropped",
            "object": "leaf"
          },
          {
            "subject": "beetle",
            "action": "carried",
            "object": "ant"
          },
          {
            "subject": "rabbit",
            "action": "stepped over",
            "object": "beetle"
          },
          {
            "subject": "fox",
            "action": "sniffed",
            "object": "rabbit"
          },
          {
            "subject": "deer",
            "action": "chased",
            "object": "fox"
          },
          {
            "subject": "park ranger",
            "action": "startled",
            "object": "deer"
          }
        ],
        "middle_entity": "rabbit",
        "all_entities": [
          "leaf",
          "rabbit",
          "ant",
          "deer",
          "fox",
          "park ranger",
          "beetle"
        ],
        "questions_by_entity": {
          "leaf": [
            {
              "question": "What did the leaf do?",
              "answer": "flutter",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "leaf",
              "is_middle_entity": false
            },
            {
              "question": "What dropped the leaf?",
              "answer": "the ant",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "leaf",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "leaf",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was dropped do?",
              "answer": "fluttered",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "leaf",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the leaf's action?",
              "answer": "the park ranger startling the deer which led to the deer chasing the fox which led to the fox sniffing the rabbit which led to the rabbit stepping over the beetle which led to the beetle carrying the ant which led to the ant dropping the leaf",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "leaf",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the leaf's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "leaf",
              "is_middle_entity": false
            }
          ],
          "rabbit": [
            {
              "question": "What did the rabbit do?",
              "answer": "step over the beetle",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "rabbit",
              "is_middle_entity": true
            },
            {
              "question": "What sniffed the rabbit?",
              "answer": "the fox",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "rabbit",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "rabbit",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was sniffed do?",
              "answer": "stepped over the beetle",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "rabbit",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the rabbit's action?",
              "answer": "the park ranger startling the deer which led to the deer chasing the fox which led to the fox sniffing the rabbit",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "rabbit",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the rabbit's involvement?",
              "answer": "the beetle carried the ant",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "rabbit",
              "is_middle_entity": true
            }
          ],
          "ant": [
            {
              "question": "What did the ant do?",
              "answer": "drop the leaf",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "What carried the ant?",
              "answer": "the beetle",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was carried do?",
              "answer": "dropped the leaf",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the ant's action?",
              "answer": "the park ranger startling the deer which led to the deer chasing the fox which led to the fox sniffing the rabbit which led to the rabbit stepping over the beetle which led to the beetle carrying the ant",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the ant's involvement?",
              "answer": "the leaf fluttered",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "ant",
              "is_middle_entity": false
            }
          ],
          "deer": [
            {
              "question": "What did the deer do?",
              "answer": "chase the fox",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "deer",
              "is_middle_entity": false
            },
            {
              "question": "Who startled the deer?",
              "answer": "the park ranger",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "deer",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "deer",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "chased the fox",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "deer",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the deer's action?",
              "answer": "the park ranger startling the deer",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "deer",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the deer's involvement?",
              "answer": "the fox sniffed the rabbit",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "deer",
              "is_middle_entity": false
            }
          ],
          "fox": [
            {
              "question": "What did the fox do?",
              "answer": "sniff the rabbit",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What chased the fox?",
              "answer": "the deer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "sniffed the rabbit",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the fox's action?",
              "answer": "the park ranger startling the deer which led to the deer chasing the fox",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the fox's involvement?",
              "answer": "the rabbit stepped over the beetle",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fox",
              "is_middle_entity": false
            }
          ],
          "park ranger": [
            {
              "question": "What did the park ranger do?",
              "answer": "startle the deer",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the park ranger?",
              "answer": "the deer",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the park ranger do?",
              "answer": "chased the fox",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the park ranger's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "park ranger",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the park ranger's involvement?",
              "answer": "the deer chased the fox",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "park ranger",
              "is_middle_entity": false
            }
          ],
          "beetle": [
            {
              "question": "What did the beetle do?",
              "answer": "carry the ant",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "What stepped over the beetle?",
              "answer": "the rabbit",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was stepped over do?",
              "answer": "carried the ant",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the beetle's action?",
              "answer": "the park ranger startling the deer which led to the deer chasing the fox which led to the fox sniffing the rabbit which led to the rabbit stepping over the beetle",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "beetle",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the beetle's involvement?",
              "answer": "the ant dropped the leaf",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "beetle",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_29",
        "sentence": "The fly that the caterpillar that the ant that the butterfly that the mosquito that the frog that the chameleon spotted lunged at startled chased blocked crawled toward buzzed.",
        "structure": [
          {
            "subject": "fly",
            "action": "buzzed",
            "object": null
          },
          {
            "subject": "caterpillar",
            "action": "crawled toward",
            "object": "fly"
          },
          {
            "subject": "ant",
            "action": "blocked",
            "object": "caterpillar"
          },
          {
            "subject": "butterfly",
            "action": "chased",
            "object": "ant"
          },
          {
            "subject": "mosquito",
            "action": "startled",
            "object": "butterfly"
          },
          {
            "subject": "frog",
            "action": "lunged at",
            "object": "mosquito"
          },
          {
            "subject": "chameleon",
            "action": "spotted",
            "object": "frog"
          }
        ],
        "middle_entity": "butterfly",
        "all_entities": [
          "caterpillar",
          "mosquito",
          "butterfly",
          "ant",
          "frog",
          "chameleon",
          "fly"
        ],
        "questions_by_entity": {
          "caterpillar": [
            {
              "question": "What did the caterpillar do?",
              "answer": "crawl toward the fly",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "caterpillar",
              "is_middle_entity": false
            },
            {
              "question": "What blocked the caterpillar?",
              "answer": "the ant",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "caterpillar",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "caterpillar",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was blocked do?",
              "answer": "crawled toward the fly",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "caterpillar",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the caterpillar's action?",
              "answer": "the chameleon spotting the frog which led to the frog lunging at the mosquito which led to the mosquito startling the butterfly which led to the butterfly chasing the ant which led to the ant blocking the caterpillar",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "caterpillar",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the caterpillar's involvement?",
              "answer": "the fly buzzed",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "caterpillar",
              "is_middle_entity": false
            }
          ],
          "mosquito": [
            {
              "question": "What did the mosquito do?",
              "answer": "startle the butterfly",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "mosquito",
              "is_middle_entity": false
            },
            {
              "question": "What lunged at the mosquito?",
              "answer": "the frog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "mosquito",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "mosquito",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was lunged at do?",
              "answer": "startled the butterfly",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "mosquito",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the mosquito's action?",
              "answer": "the chameleon spotting the frog which led to the frog lunging at the mosquito",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "mosquito",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the mosquito's involvement?",
              "answer": "the butterfly chased the ant",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "mosquito",
              "is_middle_entity": false
            }
          ],
          "butterfly": [
            {
              "question": "What did the butterfly do?",
              "answer": "chase the ant",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "butterfly",
              "is_middle_entity": true
            },
            {
              "question": "What startled the butterfly?",
              "answer": "the mosquito",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "butterfly",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "butterfly",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "chased the ant",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "butterfly",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the butterfly's action?",
              "answer": "the chameleon spotting the frog which led to the frog lunging at the mosquito which led to the mosquito startling the butterfly",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "butterfly",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the butterfly's involvement?",
              "answer": "the ant blocked the caterpillar",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "butterfly",
              "is_middle_entity": true
            }
          ],
          "ant": [
            {
              "question": "What did the ant do?",
              "answer": "block the caterpillar",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "What chased the ant?",
              "answer": "the butterfly",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "blocked the caterpillar",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the ant's action?",
              "answer": "the chameleon spotting the frog which led to the frog lunging at the mosquito which led to the mosquito startling the butterfly which led to the butterfly chasing the ant",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "ant",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the ant's involvement?",
              "answer": "the caterpillar crawled toward the fly",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "ant",
              "is_middle_entity": false
            }
          ],
          "frog": [
            {
              "question": "What did the frog do?",
              "answer": "lung at the mosquito",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "What spotted the frog?",
              "answer": "the chameleon",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was spotted do?",
              "answer": "lunged at the mosquito",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the frog's action?",
              "answer": "the chameleon spotting the frog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "frog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the frog's involvement?",
              "answer": "the mosquito startled the butterfly",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "frog",
              "is_middle_entity": false
            }
          ],
          "chameleon": [
            {
              "question": "What did the chameleon do?",
              "answer": "spot the frog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "chameleon",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the chameleon?",
              "answer": "the frog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "chameleon",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "chameleon",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the chameleon do?",
              "answer": "lunged at the mosquito",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "chameleon",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the chameleon's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "chameleon",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the chameleon's involvement?",
              "answer": "the frog lunged at the mosquito",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "chameleon",
              "is_middle_entity": false
            }
          ],
          "fly": [
            {
              "question": "What did the fly do?",
              "answer": "buzz",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What crawled toward the fly?",
              "answer": "the caterpillar",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was crawled toward do?",
              "answer": "buzzed",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the fly's action?",
              "answer": "the chameleon spotting the frog which led to the frog lunging at the mosquito which led to the mosquito startling the butterfly which led to the butterfly chasing the ant which led to the ant blocking the caterpillar which led to the caterpillar crawling toward the fly",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "fly",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the fly's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "fly",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      },
      {
        "id": "complexity_6_sentence_30",
        "sentence": "The apple that the worm that the bird that the squirrel that the cat that the dog that the child saw barked at chased startled pecked nudged rolled.",
        "structure": [
          {
            "subject": "apple",
            "action": "rolled",
            "object": null
          },
          {
            "subject": "worm",
            "action": "nudged",
            "object": "apple"
          },
          {
            "subject": "bird",
            "action": "pecked",
            "object": "worm"
          },
          {
            "subject": "squirrel",
            "action": "startled",
            "object": "bird"
          },
          {
            "subject": "cat",
            "action": "chased",
            "object": "squirrel"
          },
          {
            "subject": "dog",
            "action": "barked at",
            "object": "cat"
          },
          {
            "subject": "child",
            "action": "saw",
            "object": "dog"
          }
        ],
        "middle_entity": "squirrel",
        "all_entities": [
          "apple",
          "squirrel",
          "dog",
          "worm",
          "child",
          "bird",
          "cat"
        ],
        "questions_by_entity": {
          "apple": [
            {
              "question": "What did the apple do?",
              "answer": "roll",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "apple",
              "is_middle_entity": false
            },
            {
              "question": "What nudged the apple?",
              "answer": "the worm",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "apple",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "apple",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was nudged do?",
              "answer": "rolled",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "apple",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the apple's action?",
              "answer": "the child seeing the dog which led to the dog barking at the cat which led to the cat chasing the squirrel which led to the squirrel startling the bird which led to the bird pecking the worm which led to the worm nudging the apple",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "apple",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the apple's involvement?",
              "answer": "none",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "apple",
              "is_middle_entity": false
            }
          ],
          "squirrel": [
            {
              "question": "What did the squirrel do?",
              "answer": "startle the bird",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "squirrel",
              "is_middle_entity": true
            },
            {
              "question": "What chased the squirrel?",
              "answer": "the cat",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "squirrel",
              "is_middle_entity": true
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "squirrel",
              "is_middle_entity": true
            },
            {
              "question": "What did the entity that was chased do?",
              "answer": "startled the bird",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "squirrel",
              "is_middle_entity": true
            },
            {
              "question": "What series of events led to the squirrel's action?",
              "answer": "the child seeing the dog which led to the dog barking at the cat which led to the cat chasing the squirrel",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "squirrel",
              "is_middle_entity": true
            },
            {
              "question": "What is the consequence of the squirrel's involvement?",
              "answer": "the bird pecked the worm",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "squirrel",
              "is_middle_entity": true
            }
          ],
          "dog": [
            {
              "question": "What did the dog do?",
              "answer": "bark at the cat",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "Who saw the dog?",
              "answer": "the child",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was seen do?",
              "answer": "barked at the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the dog's action?",
              "answer": "the child seeing the dog",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the dog's involvement?",
              "answer": "the cat chased the squirrel",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "dog",
              "is_middle_entity": false
            }
          ],
          "worm": [
            {
              "question": "What did the worm do?",
              "answer": "nudge the apple",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What pecked the worm?",
              "answer": "the bird",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was pecked do?",
              "answer": "nudged the apple",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the worm's action?",
              "answer": "the child seeing the dog which led to the dog barking at the cat which led to the cat chasing the squirrel which led to the squirrel startling the bird which led to the bird pecking the worm",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "worm",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the worm's involvement?",
              "answer": "the apple rolled",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "worm",
              "is_middle_entity": false
            }
          ],
          "child": [
            {
              "question": "What did the child do?",
              "answer": "see the dog",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What was affected by the child?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity acted upon by the child do?",
              "answer": "barked at the cat",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the child's action?",
              "answer": "no prior events",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the child's involvement?",
              "answer": "the dog barked at the cat",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "child",
              "is_middle_entity": false
            }
          ],
          "bird": [
            {
              "question": "What did the bird do?",
              "answer": "peck the worm",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What startled the bird?",
              "answer": "the squirrel",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was startled do?",
              "answer": "pecked the worm",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the bird's action?",
              "answer": "the child seeing the dog which led to the dog barking at the cat which led to the cat chasing the squirrel which led to the squirrel startling the bird",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the bird's involvement?",
              "answer": "the worm nudged the apple",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "bird",
              "is_middle_entity": false
            }
          ],
          "cat": [
            {
              "question": "What did the cat do?",
              "answer": "chase the squirrel",
              "type": "action_performed",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What barked at the cat?",
              "answer": "the dog",
              "type": "agent_identification",
              "difficulty": "easy",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "How many distinct entities are in the sentence?",
              "answer": "7",
              "type": "entity_count",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What did the entity that was barked at do?",
              "answer": "chased the squirrel",
              "type": "nested_dependency",
              "difficulty": "medium",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What series of events led to the cat's action?",
              "answer": "the child seeing the dog which led to the dog barking at the cat",
              "type": "causal_sequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            },
            {
              "question": "What is the consequence of the cat's involvement?",
              "answer": "the squirrel startled the bird",
              "type": "chain_consequence",
              "difficulty": "hard",
              "entity": "cat",
              "is_middle_entity": false
            }
          ]
        },
        "total_questions": 42
      }
    ],
    "total_questions": 1260,
    "entities_processed": 210,
    "middle_entities_flagged": 30
  }
}