We attribute the significant performance gain of our model over the baseline to a combination of several factors as described below: 
 Question: Do they train a different training method except from scheduled sampling?
Answer with content missing: (list missing) 
Scheduled sampling: In our experiments, we found that models trained with scheduled sampling performed better (about 0.004 BLEU-4 on validation set) than the ones trained using teacher-forcing for the AVSD dataset. Hence, we use scheduled sampling for all the results we report in this paper.

Yes.