The NUS statistical machine translation system for IWSLT 2009 Preslav Nakov author Chang Liu author Wei Lu author Hwee Tou Ng author 2009-dec 1-2 text Proceedings of the 6th International Workshop on Spoken Language Translation: Evaluation Campaign Tokyo, Japan conference publication nakov-etal-2009-nus https://aclanthology.org/2009.iwslt-evaluation.14/ 2009-dec 1-2 91 98