14. The computer-implemented method of claim 8 , wherein the social object matrix comprises a social object-by-person matrix.
8. A computer-implemented method, comprising: determining, by one or more computing systems, a plurality of social interactions associated with a plurality of people, each social interaction comprising a particular person interacting with a particular social object of a plurality of social objects; generating, by the one or more computing systems, a social object matrix using the determined social interactions; generating, by the one or more computing systems, a social brain by performing Singular Value Decomposition (SVD) on the social object matrix, the social brain comprising a singular value representation of the social object matrix; determining, by the one or more computing systems, text from the social objects of the determined social interactions; generating, by the one or more computing systems, a term-document matrix (TDM) using the determined text; generating, by the one or more computing systems, a semantic brain by performing SVD on the TDM, the semantic brain comprising a singular value representation of the TDM; generating, by the one or more computing systems, an index using the determined text; and performing, by the one or more computing systems, a query using the social brain, the semantic brain, and the index.