RRS

| | Train | Validation | Test | Ranking Test | | --------- | ----- | ---------- | ------- | ------------ | | size | 0.4M | 50K | 5K | 800 | | pos:neg | 1:1 | 1:9 | 1.2:8.8 | - | | avg turns | 5.0 | 5.0 | 5.0 | 5.0 |

Ranking test set contains the high-quality responses that selected by some baselines, and their correlation with the conversation context are carefully annotated by 8 professional annotators (the average annotation scores are saved for ranking). For ranking test set, the metrics should be NDCG@3 and NDCG@5, since the correlation scores are provided. More details are available in the Appendix of the paper.