Generating Natural Answers by Incorporating Copying and Retrieving Mechanisms in Sequence-to-Sequence Learning Shizhu He author Cao Liu author Kang Liu author Jun Zhao author 2017-07 text Proceedings of the 55th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers) Regina Barzilay editor Min-Yen Kan editor Association for Computational Linguistics Vancouver, Canada conference publication he-etal-2017-generating 10.18653/v1/P17-1019 https://aclanthology.org/P17-1019/ 2017-07 199 208