It is clear that our models (SPMN500, SPMN1000, DPMN100) generate much more informative and valid responses and much less meaningless or "safe" responses than baseline models (S2SA, TAS2S).
sPMN500, sPMN1000 and DPMN100 all  Table 2: Human Annotation outperform s2sA and TAs2s by producing more informative and valid responses.