Machine Translation with Unsupervised Length-Constraints
Table 2: Using oracle length
['Model', 'BLEU', 'RUSE']
Initially, we wanted to investigate the difficulty of having the additional length constraints. Therefore, we used the length of the human reference translation as a first target length. One could even argue that should make the typical machine translation easier, since some information about the translation is known. Since we do not perform compression in this experiment, the aforementioned problem with BLEU should not apply here.