Syntactically Guided Neural Machine Translation
F Stahlberg, E Hasler, A Waite, B Byrne - arXiv preprint arXiv:1605.04569, 2016
... The En-De training set includes Europarl v7, Common Crawl, and News Commentary v10. Sentence pairs with sentences longer than 80 words or length ratios exceeding 2.4:1 were deleted, as were Common Crawl sentences from other languages (Shuyo, 2010). ...