['nq_open', 'trivia_qa', 'web_questions', 'trec']
['pytorch', 'tf', 'dpr', 'en', 'dataset:nq_open', 'dataset:trivia_qa', 'dataset:web_questions', 'dataset:trec', 'arxiv:2004.04906', 'arxiv:1702.08734', 'arxiv:1910.09700', 'transformers', 'license:cc-by-nc-4.0']