Ad-hoc Document Retrieval using Weak-Supervision with BERT and GPT2 Yosi Mass author Haggai Roitman author 2020-11 text Proceedings of the 2020 Conference on Empirical Methods in Natural Language Processing (EMNLP) Bonnie Webber editor Trevor Cohn editor Yulan He editor Yang Liu editor Association for Computational Linguistics Online conference publication mass-roitman-2020-ad 10.18653/v1/2020.emnlp-main.343 https://aclanthology.org/2020.emnlp-main.343/ 2020-11 4191 4197