Update README.md

README.md

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 Embedding Model in Paper: Distributionally Robust Unsupervised Dense Retrieval Training on Web Graphs
 
-This model is trained by predicting links between web pages. It serves as an encoder to generate dense vectors that are later used for clustering documents.
-See more about this model and our work at https://github.com/OpenMatch/Web-DRO .
+This model is trained by predicting links between web pages. It serves as an encoder to generate dense vectors that are later used for clustering documents. If you want to reproduce our evaluation results or learn more about our work, please refer to https://github.com/OpenMatch/Web-DRO .