Soft string-to-dependency hierarchical machine translation Jan-Thorsten Peter author Matthias Huck author Hermann Ney author Daniel Stein author 2011-dec 8-9 text Proceedings of the 8th International Workshop on Spoken Language Translation: Papers Marcello Federico editor Mei-Yuh Hwang editor Margit Rödder editor Sebastian Stüker editor San Francisco, California conference publication peter-etal-2011-soft https://aclanthology.org/2011.iwslt-papers.8/ 2011-dec 8-9 246 253