Unsupervised Training for Large Vocabulary Translation Using Sparse Lexicon and Word Classes Yunsu Kim author Julian Schamper author Hermann Ney author 2017-04 text Proceedings of the 15th Conference of the European Chapter of the Association for Computational Linguistics: Volume 2, Short Papers Mirella Lapata editor Phil Blunsom editor Alexander Koller editor Association for Computational Linguistics Valencia, Spain conference publication kim-etal-2017-unsupervised https://aclanthology.org/E17-2103/ 2017-04 650 656