@inproceedings{SIGMOD-2009-ChenGDYR,
	author        = "Fei Chen and Byron J. Gao and AnHai Doan and Jun Yang and Raghu Ramakrishnan",
	booktitle     = "{Proceedings of the 27th ACM SIGMOD International Conference on Management of Data}",
	doi           = "10.1145/1559845.1559881",
	isbn          = "978-1-60558-551-2",
	pages         = "321--334",
	publisher     = "{ACM}",
	title         = "{Optimizing complex extraction programs over evolving text data}",
	year          = 2009,
}