Conversational Graph Grounded Policy Learning for Open-Domain Conversation Generation Jun Xu author Haifeng Wang author Zheng-Yu Niu author Hua Wu author Wanxiang Che author Ting Liu 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 xu-etal-2020-conversational 10.18653/v1/2020.acl-main.166 https://aclanthology.org/2020.acl-main.166/ 2020-07 1835 1845