Update README.md

README.md

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----
-license: apache-2.0
----
+---
+license: apache-2.0
+task_categories:
+- text-retrieval
+language:
+- ar
+- en
+- ru
+- zh
+tags:
+- multilingual
+- RAG
+- News
+size_categories:
+- 1M<n<10M
+---
+
+# RAGTIME1 Collection
+
+This dataset contains the documents for (TREC RAGTIME Track)[https://trec-ragtime.github.io/]. 
+Please refer to the website for the details of the task. 
+
+RAGTIME is a multilingual RAG task, which expects the participating system to retrieve relevant documents from all four languages and synthesize a response with citation to the report request. 
+For convenience, we separate the documents by their languages into four `.jsonl` files. However, they are intended to be used as a whole set. 
+
+The documents are extracted from Common Crawl News and sampled between August 1, 2021, and July 31, 2024, with an even number of documents every day. 
+Each language has 1,000,095 documents. 
+
+## Citation and Attribution
+
+If you use this collection, please cite our overview paper, which does not exist yet. 
+
+The best way to provide attribution is to participate in our shared task. 
+We would love to have your RAG systems and evaluate them :)
+
+