11. The computer software product according to claim 10 , wherein the instructions cause the computer to perform the additional steps of: expanding the initial social circle by building respective new social circles having new associations by crawling the plurality of web sites; and deriving additional references to the target individual from the new associations in the new social circles.
11. The computer software product according to claim 10 , wherein the instructions cause the computer to perform the additional steps of: expanding the initial social circle by building respective new social circles having new associations by crawling the plurality of web sites; and deriving additional references to the target individual from the new associations in the new social circles. 12. The computer software product according to claim 11 , further comprising performing the steps of expanding the initial social circle and deriving additional references recursively based on the new associations.