1. A computer system comprising: a memory; a plurality of answers stored in the memory; a correlator that, for each respective single answer, extracts a plurality of related queries corresponding to the respective single answer, at least two of the related queries corresponding to the respective single answer being different from one another; a classifier that assigns a category to each of the related queries such that there are a plurality of categories assigned to the related queries corresponding to the respective single answer, wherein one of the plurality of categories is a spam category and answers in the spam category are not downloaded; and a statistical tool that determines the relevance of the plurality of categories relative to one another and assigns at least one assigned category, of the categories assigned to the related queries corresponding to the respective single answer, to the respective single answer.