@inproceedings{SIGIR-2009-LiWA,
	author        = "Xiao Li and Ye-Yi Wang and Alex Acero",
	booktitle     = "{Proceedings of the 32nd International ACM SIGIR Conference on Research and Development in Information Retrieval}",
	doi           = "10.1145/1571941.1572039",
	isbn          = "978-1-60558-483-6",
	pages         = "572--579",
	publisher     = "{ACM}",
	title         = "{Extracting structured information from user queries with semi-supervised conditional random fields}",
	year          = 2009,
}