Deep Recurrent Models with Fast-Forward Connections for Neural Machine Translation
Table 9: BLEU scores of the subset of the test set without considering unknown words.
['Model', 'Test set', 'Ratio(%)', 'BLEU']
4.5.2 Unknown words Next we look into the detail of the effect of unknown words on the English-to-French task. We select the subset without unknown words on target sentences from the original test set. There are 1705 such sentences (56.8%). We compute the BLEU scores on this subset and the results are shown in Tab.