A method, computer system, and computer program product for retrieving information is provided. The method comprises receiving an information request, determining corresponding confidence indexes of a plurality of information sources, each of the confidence indexes being indicative of a capability of the corresponding information source to respond to the information request determined according to one or more social activities relating thereto, selecting a selected information source of said information sources according to the confidence indexes, submitting the information request to the selected information source, receiving selected information from the selected information source in response to the information request, and returning the selected information as a result of the information request.