before_sent:  While the need for tagging (noising) the dataset has been removed, the approach outperformed the tagged back-translation approach by an average of 0.4 BLEU  .
before_sent_with_intent: <clarity>  While the need for tagging (noising) the dataset has been removed, the approach outperformed the tagged back-translation approach by an average of 0.4 BLEU  .
after_sent:  While the need for tagging (noising) the dataset has been removed, the approach outperformed the tagged back-translation by 0.4 BLEU .