Graph Convolutional Encodersfor Syntax-aware Neural Machine Translation
Table 4: Test results for English-Czech.
['[EMPTY]', 'Kendall', 'BLEU1', 'BLEU4']
While it is difficult to obtain high absolute BLEU scores on this dataset, we can still see similar relative improvements. Again the BoW baseline scores worst, with the BoW+GCN easily beating that result. The CNN baseline scores BLEU4 of 8.1, but the CNN+GCN improves on that, this time by +1.0 and +0.6 for BLEU1 and BLEU4, respectively. Interestingly, BLEU1 scores for the BoW+GCN and CNN+GCN models are higher than both baselines so far. Finally, the BiRNN baseline scores a BLEU4 of 8.9, but it is again beaten by the BiRNN+GCN model with +1.9 BLEU1 and +0.7 BLEU4.