A Trigger Language Model-based IR System Jun-lin Zhang author Le Sun author Wei-min Qu author Yu-fang Sun author 2004-aug 23–aug 27 text COLING 2004: Proceedings of the 20th International Conference on Computational Linguistics COLING Geneva, Switzerland conference publication zhang-etal-2004-trigger https://aclanthology.org/C04-1098/ 2004-aug 23–aug 27 680 685