BiST: Bi-directional Spatio-Temporal Reasoning for Video-Grounded Dialogues Hung Le author Doyen Sahoo author Nancy Chen author Steven C.H. Hoi author 2020-11 text Proceedings of the 2020 Conference on Empirical Methods in Natural Language Processing (EMNLP) Bonnie Webber editor Trevor Cohn editor Yulan He editor Yang Liu editor Association for Computational Linguistics Online conference publication le-etal-2020-bist 10.18653/v1/2020.emnlp-main.145 https://aclanthology.org/2020.emnlp-main.145/ 2020-11 1846 1859