Different Structures for Evaluating Answers to Complex Questions: Pyramids Won’t Topple, and Neither Will Human Assessors Hoa Trang Dang author Jimmy Lin author 2007-06 text Proceedings of the 45th Annual Meeting of the Association of Computational Linguistics Annie Zaenen editor Antal van den Bosch editor Association for Computational Linguistics Prague, Czech Republic conference publication dang-lin-2007-different https://aclanthology.org/P07-1097/ 2007-06 768 775