Mining Search Engine Clickthrough Log for Matching N-gram Features Huihsin Tseng author Longbin Chen author Fan Li author Ziming Zhuang author Lei Duan author Belle Tseng author 2009-08 text Proceedings of the 2009 Conference on Empirical Methods in Natural Language Processing Philipp Koehn editor Rada Mihalcea editor Association for Computational Linguistics Singapore conference publication tseng-etal-2009-mining https://aclanthology.org/D09-1055/ 2009-08 524 533