Update README.md

README.md

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 license: cc-by-4.0
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+
+
+# Hansel: A Chinese Few-Shot and Zero-Shot Entity Linking Benchmark
+
+
+## Contents
+
+- [Overview](#overview)
+- [Dataset](#dataset)
+- [Citation](#citation)
+
+## Overview
+
+Hansel is a high-quality human-annotated Chinese entity linking (EL) dataset, focusing on tail entities and emerging entities:
+- The test set contains Few-shot (FS) and zero-shot (ZS) slices, has 10K examples and uses Wikidata as the corresponding knowledge base.
+- The training and validation sets are from Wikipedia hyperlinks, useful for large-scale pretraining of Chinese EL systems.
+  
+Please see our [WSDM 2023](https://www.wsdm-conference.org/2023/) paper [**Hansel**](https://arxiv.org/abs/2207.13005) to learn more about our dataset.
+
+## Dataset
+
+### Data Statistics
+
+|     | # Mentions |  # Entities | Domain |
+| ----  | ---- | ---- | ---- |
+|  Train   | 9,879,813 | 541,058 | Wikipedia |
+|  Validation   | 9,674 | 6,320  | Wikipedia |
+|  Hansel-FS   | 5,260 | 2,720 | News, Social Media |
+|  Hansel-ZS  | 4,715  | 4,046 | News, Social Media, E-books, etc.|
+
+
+### Data Format
+
+    {"id": "hansel-eval-zs-1463", 
+     "text": "1905电影网讯 已经筹备了十余年的吉尔莫·德尔·托罗的《匹诺曹》，在上个月顺利被网飞公司买下，成为了流媒体巨头旗下的新片。近日，这部备受关注的影片确定了自己的档期：2021年。虽然具体时间未定，但影片却已经实实在在地向前迈出了一步。", 
+     "start": 29, 
+     "end": 32, 
+     "mention": "匹诺曹", 
+     "gold_id": "Q73895818", 
+     "source": "https://www.1905.com/news/20181107/1325389.shtml", 
+     "domain": "news"
+    }
+
+## Citation
+
+If you use our dataset in your work, please cite us.
+
+```bibtex
+@misc{xu2022hansel,
+  title = {Hansel: A Chinese Few-Shot and Zero-Shot Entity Linking Benchmark},
+  author = {Xu, Zhenran and Shan, Zifei and Li, Yuxin and Hu, Baotian and Qin, Bing},
+  publisher = {arXiv},
+  year = {2022},
+  url = {https://arxiv.org/abs/2207.13005}
+}
+```