Capturing document context inside sentence-level neural machine translation models with self-training
Table 4: Results on OpenSubtitles English-Russian evaluation sets. ST: self-training.
['[EMPTY]', 'Model', 'Valid', 'Test', 'ΔBLEU']
Our self-training and oracle self-training approaches give the performance improvement of 0.1 and 0.3 BLEU respectively. We hypothesize that the small improvement of self-training is due to relatively small number of sentences in the documents in the OpenSubtitles dataset. We validate this claim by varying the number of sentences in the document used for self-training on NIST dataset.