Hao Ma Raman Chandrasekar Chris Quirk Abhishek Gupta Page Hunt: using human computation games to improve web search. 27-28 2009 KDD Workshop on Human Computation http://doi.acm.org/10.1145/1600150.1600158 conf/kdd/2009hcomp db/conf/kdd/hcomp2009.html#MaCQG09