Improve SMT with Source-Side “Topic-Document” Distributions Zhengxian Gong author Guodong Zhou author Liangyou Li author 2011-sep 19-23 text Proceedings of Machine Translation Summit XIII: Papers Xiamen, China conference publication gong-etal-2011-improve https://aclanthology.org/2011.mtsummit-papers.57/ 2011-sep 19-23