Query Snowball: A Co-occurrence-based Approach to Multi-document Summarization for Question Answering Hajime Morita author Tetsuya Sakai author Manabu Okumura author 2011-06 text Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies Dekang Lin editor Yuji Matsumoto editor Rada Mihalcea editor Association for Computational Linguistics Portland, Oregon, USA conference publication morita-etal-2011-query https://aclanthology.org/P11-2039/ 2011-06 223 229