By using the word alignments and similarity comparison between the original and back-translated reviews, we want to find the new aspect labels for the new (back-translated) reviews.
We discard the new reviews which have a similarity score below a threshold with the original reviews (the threshold is 0.5 for now)
We add the labels which are aligned with the original labels as the labels of similar-semantic new reviews.
By using the word alignments and similarity comparison between the original and back-translated reviews, we want to find the new aspect labels for the new (back-translated) reviews.