A Nil-Aware Answer Extraction Framework for Question Answering Souvik Kundu author Hwee Tou Ng author 2018-oct-nov text Proceedings of the 2018 Conference on Empirical Methods in Natural Language Processing Ellen Riloff editor David Chiang editor Julia Hockenmaier editor Jun’ichi Tsujii editor Association for Computational Linguistics Brussels, Belgium conference publication kundu-ng-2018-nil 10.18653/v1/D18-1456 https://aclanthology.org/D18-1456/ 2018-oct-nov 4243 4252