QA-It: Classifying Non-Referential It for Question Answer Pairs Timothy Lee author Alex Lutz author Jinho D Choi author 2016-08 text Proceedings of the ACL 2016 Student Research Workshop He He editor Tao Lei editor Will Roberts editor Association for Computational Linguistics Berlin, Germany conference publication lee-etal-2016-qa 10.18653/v1/P16-3020 https://aclanthology.org/P16-3020/ 2016-08 132 137