Update README.md

README.md

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----
-license: mit
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+---
+license: apache-2.0
+language:
+- en
+task_categories:
+- text-ranking
+- text-retrieval
+pretty_name: BlockRank MS MARCO Training Data (10% Sample)
+size_categories:
+- 10K<n<100K
+---
+
+# BlockRank MS MARCO Training Data (10% Sample)
+
+## Dataset Description
+
+A 10% sample of MS MARCO passage ranking data formatted for in-context ranking with LLMs. Based on [sentence-transformers/msmarco-distilbert-base-v3](https://huggingface.co/sentence-transformers/msmarco-distilbert-base-v3).
+
+- **Format**: JSONL (in-context ranking format)
+- **Size**: 50k training examples (10% sample)
+- **Documents per query**: 30-50 candidates (mix of positives and hard negatives)
+
+## Source
+
+- **Original**: [MS MARCO Passage Ranking](https://microsoft.github.io/msmarco/)
+- **Retrieval annotations**: sentence-transformers/msmarco-distilbert-base-v3
+- **Sampling**: 10% random sample of training queries
+- **Negatives**: Top dense retrieval results from msmarco-distilbert-base-v3 sbert model (excluding positives)
+
+
+## License
+
+Apache 2.0 (following MS MARCO license)
+