11. The method of claim 10 , said aspect of relevance being based on a comparison of words in said query with wall posts or tweets of people in said social graph.
10. A method of providing search results, the method comprising: using a processor to perform acts comprising: receiving a query from a user; determining that the query is answerable with subjective information; obtaining objective results from a corpus of information; using a social graph to identify one or more people who are friends of said user in said social graph, and who have an aspect of relevance to said query; creating person results that comprise said one or more people and, for each of said one or more people, an explanation of each person's relevance to said query; providing, to said user, a set of results that comprise said objective results and said person results, each of said person results being actionable to initiate contact between said user and a person identified in a given result; and training a classifier to identify queries that call for subjective information using training data that comprises: a plurality of positive examples of queries for which people were provided as search results and in which users who requested the results clicked on the people in the results; and a plurality of negative examples of queries for which people were provided as search results and in which users who requested the results did not click on the people in the results; said determining that said query calls for subjective information being performed using said classifier, with said classifier having been trained on said training data.