Improving Transformer-Based Neural Machine Translation with Prior Alignments

Table 3

Overview of the datasets.

Vietnamese/English	Training	Validation	Testing
Number of news articles	930	40	30
Number of sentences	42,026	1,482	1,527
Average sentence length	26.2/19.2	24.5/17.8	28.3/20.6
Alignments per sentence	22.4	20.8	23.1
Number of unique tokens	16441/36672	2720/4981	3462/6211
Number of alignments	942001	30821	35291
Number of tokens	1099205/806456	36276/26315	43286/31513