A Non-Factoid Question-Answering Taxonomy
Valeriya Baranova-Bolotova, Vladislav Blinov, Falk Scholer, W. Bruce Croft, Mark Sanderson · Proceedings of the 45th International ACM SIGIR Conference on Research and Development in Information Retrieval · 2022
Non-factoid question answering (NFQA) is a challenging and under-researched task that requires constructing long-form answers, such as explanations or opinions, to open-ended non-factoid questions - NFQs. There is still little understanding of the categories of NFQs that people tend to ask, what form of answers they expect to see in return, and what the key research challenges of each category are.