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[EMNLP 2022] This is the code repo for our EMNLP‘22 paper "COCO-DR: Combating Distribution Shifts in Zero-Shot Dense Retrieval with Contrastive and Distributionally Robust Learning".

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Hello, thanks for your interesting work! I'm tring to recomplete COCO Pre-training and I noticed that I need to preprocess the dataset. This is mentioned in the` ./COCO-DR/COCO/README.md` But when...