@inproceedings{PODS-2013-FaginKRV,
	author        = "Ronald Fagin and Benny Kimelfeld and Frederick Reiss and Stijn Vansummeren",
	booktitle     = "{Proceedings of the 32nd Symposium on Principles of Database Systems}",
	doi           = "10.1145/2463664.2463665",
	isbn          = "978-1-4503-2066-5",
	pages         = "37--48",
	publisher     = "{ACM}",
	title         = "{Spanners: a formal framework for information extraction}",
	year          = 2013,
}