Create README.md

README.md

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+# FactStatement Dataset
+
+## Overview
+
+FactStatement is the foundational layer of FactNet, a cross-lingual, multi-layered fact knowledge graph. FactStatements are language-neutral, atomic fact units directly mapped from Wikidata statements, forming the core building blocks of the knowledge graph.
+
+## Dataset Format
+
+The dataset contains parquet files with the following key fields:
+
+- `core_id`: Unique identifier for the fact statement
+- `subject_qid`: Wikidata QID of the subject entity
+- `property_pid`: Wikidata PID of the property
+- `value`: Raw value from Wikidata
+- `value_qid`: Entity QID if the value is an entity (otherwise null)
+- `normalized_value`: Standardized representation of the value
+- `claim_hash`: Standardized hash of subject|property|normalized_value|qualifiers
+- `qualifiers`: Qualifier information (time, location, etc.)
+- `references`: Source information
+- `rank`: Wikidata rank (preferred, normal, deprecated)
+- `confidence`: Computed confidence score
+
+## Usage
+
+FactStatements are designed to be language-neutral representations of facts that can be linguistically realized through the FactSense layer and semantically grouped through the FactSynset layer.
+
+## License
+
+This dataset is derived from Wikidata and is available under the CC0 license.
+
+## Citation
+
+```
+@article{shen2026factnet,
+  title={FactNet: A Billion-Scale Knowledge Graph for Multilingual Factual Grounding},
+  author={Shen, Yingli and Lai, Wen and Zhou, Jie and Zhang, Xueren and Wang, Yudong and Luo, Kangyang and Wang, Shuo and Gao, Ge and Fraser, Alexander and Sun, Maosong},
+  journal={arXiv preprint arXiv:2602.03417},
+  year={2026}
+}
+```