Two methods for stabilizing MERT Masao Utiyama author Hirofumi Yamamoto author Eiichiro Sumita author 2009-dec 1-2 text Proceedings of the 6th International Workshop on Spoken Language Translation: Evaluation Campaign Tokyo, Japan conference publication utiyama-etal-2009-two https://aclanthology.org/2009.iwslt-evaluation.12/ 2009-dec 1-2 79 82