Learning to Ask Conversational Questions by Optimizing Levenshtein Distance Zhongkun Liu author Pengjie Ren author Zhumin Chen author Zhaochun Ren author Maarten de Rijke author Ming Zhou author 2021-08 text Proceedings of the 59th Annual Meeting of the Association for Computational Linguistics and the 11th International Joint Conference on Natural Language Processing (Volume 1: Long Papers) Chengqing Zong editor Fei Xia editor Wenjie Li editor Roberto Navigli editor Association for Computational Linguistics Online conference publication liu-etal-2021-learning-ask 10.18653/v1/2021.acl-long.438 https://aclanthology.org/2021.acl-long.438/ 2021-08 5638 5650