String-to-Dependency Statistical Machine Translation Libin Shen author Jinxi Xu author Ralph Weischedel author 2010-12 text journal article Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal shen-etal-2010-string 10.1162/coli_a_00015 https://aclanthology.org/J10-4005/ 2010-12 36 4 649 671