Joint Passage Ranking for Diverse Multi-Answer Retrieval Sewon Min author Kenton Lee author Ming-Wei Chang author Kristina Toutanova author Hannaneh Hajishirzi author 2021-11 text Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing Marie-Francine Moens editor Xuanjing Huang editor Lucia Specia editor Scott Wen-tau Yih editor Association for Computational Linguistics Online and Punta Cana, Dominican Republic conference publication min-etal-2021-joint 10.18653/v1/2021.emnlp-main.560 https://aclanthology.org/2021.emnlp-main.560/ 2021-11 6997 7008