We can find that Seq2Seq+aug+iter improves 2.59% accuracy on exact match over Slug2Slug.
slug2slug augments original training data by only deleting additional slot values not realized in the utterance with an aligner, which is not capable of the situation where the given utterance contains incorrect or additional slot values and leads more con-Utterance: Located in riverside, near Caf sicilia, is the Phoenix, a French pub that is family-friendly and has average prices and an average rating.