Document-level Consistency Verification in Machine Translation Tong Xiao author Jingbo Zhu author Shujie Yao author Hao Zhang author 2011-sep 19-23 text Proceedings of Machine Translation Summit XIII: Papers Xiamen, China conference publication xiao-etal-2011-document https://aclanthology.org/2011.mtsummit-papers.13/ 2011-sep 19-23