The RWTH Aachen machine translation system for IWSLT 2015 Jan-Thorsten Peter author Farzad Toutounchi author Stephan Peitz author Parnia Bahar author Andreas Guta author Hermann Ney author 2015-dec 3-4 text Proceedings of the 12th International Workshop on Spoken Language Translation: Evaluation Campaign Marcello Federico editor Sebastian Stüker editor Jan Niehues editor Da Nang, Vietnam conference publication peter-etal-2015-rwth-aachen https://aclanthology.org/2015.iwslt-evaluation.2/ 2015-dec 3-4 15 22