Utilizing Co-Occurrence of Answers in Question Answering Min Wu author Tomek Strzalkowski author 2006-07 text Proceedings of the 21st International Conference on Computational Linguistics and 44th Annual Meeting of the Association for Computational Linguistics Nicoletta Calzolari editor Claire Cardie editor Pierre Isabelle editor Association for Computational Linguistics Sydney, Australia conference publication wu-strzalkowski-2006-utilizing 10.3115/1220175.1220322 https://aclanthology.org/P06-1147/ 2006-07 1169 1176