Jihad Boulos Nilesh N. Dalvi Bhushan Mandhani Shobhit Mathur Christopher Ré Dan Suciu MYSTIQ: a system for finding more answers by using probabilities. 891-893 2005 conf/sigmod/2005 SIGMOD Conference http://doi.acm.org/10.1145/1066157.1066277 db/conf/sigmod/sigmod2005.html#BoulosDMMRS05