| Dataset . | Conversational . | Answer Type . | Domain . |
|---|---|---|---|
| MCTest (Richardson et al., 2013) | ✗ | Multiple choice | Children’s stories |
| CNN/Daily Mail (Hermann et al., 2015) | ✗ | Spans | News |
| Children’s book test (Hill et al., 2016) | ✗ | Multiple choice | Children’s stories |
| SQuAD (Rajpurkar et al., 2016) | ✗ | Spans | Wikipedia |
| MS MARCO (Nguyen et al., 2016) | ✗ | Free-form text, Unanswerable | Web Search |
| NewsQA (Trischler et al., 2017) | ✗ | Spans | News |
| SearchQA (Dunn et al., 2017) | ✗ | Spans | Jeopardy |
| TriviaQA (Joshi et al., 2017) | ✗ | Spans | Trivia |
| RACE (Lai et al., 2017) | ✗ | Multiple choice | Mid/High School Exams |
| Narrative QA (Kočiskỳ et al., 2018) | ✗ | Free-form text | Movie Scripts, Literature |
| SQuAD 2.0 (Rajpurkar et al., 2018) | ✗ | Spans, Unanswerable | Wikipedia |
| CoQA (this work) | ✓ | Free-form text, Unanswerable; | Children’s Stories, Literature, |
| Each answer comes with a | Mid/High School Exams, News, | ||
| text span rationale | Wikipedia, Reddit, Science |
| Dataset . | Conversational . | Answer Type . | Domain . |
|---|---|---|---|
| MCTest (Richardson et al., 2013) | ✗ | Multiple choice | Children’s stories |
| CNN/Daily Mail (Hermann et al., 2015) | ✗ | Spans | News |
| Children’s book test (Hill et al., 2016) | ✗ | Multiple choice | Children’s stories |
| SQuAD (Rajpurkar et al., 2016) | ✗ | Spans | Wikipedia |
| MS MARCO (Nguyen et al., 2016) | ✗ | Free-form text, Unanswerable | Web Search |
| NewsQA (Trischler et al., 2017) | ✗ | Spans | News |
| SearchQA (Dunn et al., 2017) | ✗ | Spans | Jeopardy |
| TriviaQA (Joshi et al., 2017) | ✗ | Spans | Trivia |
| RACE (Lai et al., 2017) | ✗ | Multiple choice | Mid/High School Exams |
| Narrative QA (Kočiskỳ et al., 2018) | ✗ | Free-form text | Movie Scripts, Literature |
| SQuAD 2.0 (Rajpurkar et al., 2018) | ✗ | Spans, Unanswerable | Wikipedia |
| CoQA (this work) | ✓ | Free-form text, Unanswerable; | Children’s Stories, Literature, |
| Each answer comes with a | Mid/High School Exams, News, | ||
| text span rationale | Wikipedia, Reddit, Science |