Soft Dependency Constraints for Reordering in Hierarchical Phrase-Based Translation Yang Gao author Philipp Koehn author Alexandra Birch author 2011-07 text Proceedings of the 2011 Conference on Empirical Methods in Natural Language Processing Regina Barzilay editor Mark Johnson editor Association for Computational Linguistics Edinburgh, Scotland, UK. conference publication gao-etal-2011-soft https://aclanthology.org/D11-1079/ 2011-07 857 868