Variational Neural Machine Translation
Table 2: BLEU scores on the new dataset. All improvements are significant at p < 0.01.
['[BOLD] System', '[BOLD] MT05', '[BOLD] MT02', '[BOLD] MT03', '[BOLD] MT04', '[BOLD] MT06', '[BOLD] MT08']
Our second experiment is carried out on a synthetic dataset where each new source sentence is a concatenation of neighboring source sentences in the original test sets. As a result, the average length of source sentences in the new dataset (> 50) is almost twice longer than the original one. This further demonstrates the advantage of introducing the latent variable.