“None of the Above”: Measure Uncertainty in Dialog Response Retrieval Yulan Feng author Shikib Mehri author Maxine Eskenazi author Tiancheng Zhao author 2020-07 text Proceedings of the 58th Annual Meeting of the Association for Computational Linguistics Dan Jurafsky editor Joyce Chai editor Natalie Schluter editor Joel Tetreault editor Association for Computational Linguistics Online conference publication feng-etal-2020-none 10.18653/v1/2020.acl-main.182 https://aclanthology.org/2020.acl-main.182/ 2020-07 2013 2020