8. The system of claim 7 , wherein generating the search plan further includes determining whether there is a conflict among the preprocessed search queries that meet the precision requirement.
8. The system of claim 7 , wherein generating the search plan further includes determining whether there is a conflict among the preprocessed search queries that meet the precision requirement. 9. The system of claim 8 , wherein determining whether there is a conflict among the preprocessed search queries that meet the precision requirement includes determining whether two or more preprocessed search queries meet the precision requirement.