The University of Helsinki submissions to theWMT19 news translation task
Table 10: Comparison of concatenation approaches for English–German document-level translation.
['System', 'BLEU news2018 Shuffled', 'BLEU news2018 Coherent']
Extended context models only make sense with coherent training data. Therefore, we ran experiments only with the training data that contain translated documents, i.e. Europarl, NewsCommentary, Rapid and the back-translations of the German news from 2018. Hence, the baseline is lower than a sentence-level model on the complete data sets provided by WMT.