Investigating Evaluation of Open-Domain Dialogue Systems With Human Generated Multiple References Prakhar Gupta author Shikib Mehri author Tiancheng Zhao author Amy Pavel author Maxine Eskenazi author Jeffrey Bigham author 2019-09 text Proceedings of the 20th Annual SIGdial Meeting on Discourse and Dialogue Satoshi Nakamura editor Milica Gasic editor Ingrid Zukerman editor Gabriel Skantze editor Mikio Nakano editor Alexandros Papangelis editor Stefan Ultes editor Koichiro Yoshino editor Association for Computational Linguistics Stockholm, Sweden conference publication gupta-etal-2019-investigating 10.18653/v1/W19-5944 https://aclanthology.org/W19-5944/ 2019-09 379 391