50 epoch
dev set:
precision: 0.965897 recall: 0.839226 fscore: 0.898117
test set:
precision: 0.966439 recall: 0.833505 fscore: 0.895063
5 epoch
dev set:
precision: 0.976429 recall: 0.940221 fscore: 0.957983
test set:
precision: 0.977595 recall: 0.936872 fscore: 0.956800