Phrase Dependency Machine Translation with Quasi-Synchronous Tree-to-Tree Features Kevin Gimpel author Noah A Smith author 2014-06 text journal article Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal gimpel-smith-2014-phrase 10.1162/COLI_a_00175 https://aclanthology.org/J14-2005/ 2014-06 40 2 349 401