Class error rates for evaluation of machine translation output Maja Popović author 2012-06 text Proceedings of the Seventh Workshop on Statistical Machine Translation Chris Callison-Burch editor Philipp Koehn editor Christof Monz editor Matt Post editor Radu Soricut editor Lucia Specia editor Association for Computational Linguistics Montréal, Canada conference publication popovic-2012-class https://aclanthology.org/W12-3106/ 2012-06 71 75