Topic-relevant Response Generation using Optimal Transport for an Open-domain Dialog System Shuying Zhang author Tianyu Zhao author Tatsuya Kawahara author 2020-12 text Proceedings of the 28th International Conference on Computational Linguistics Donia Scott editor Nuria Bel editor Chengqing Zong editor International Committee on Computational Linguistics Barcelona, Spain (Online) conference publication zhang-etal-2020-topic 10.18653/v1/2020.coling-main.359 https://aclanthology.org/2020.coling-main.359/ 2020-12 4067 4077