In Question Answering, Two Heads Are Better Than One Jennifer Chu-Carroll author Krzysztof Czuba author John Prager author Abraham Ittycheriah author 2003 text Proceedings of the 2003 Human Language Technology Conference of the North American Chapter of the Association for Computational Linguistics conference publication chu-carroll-etal-2003-question https://aclanthology.org/N03-1004/ 2003 24 31