A method and associated system for filtering content received from a search of information. Documents are received from the search. The search is based on a search request received from a requester. A subject of each received document is determined. A contributor associated with each document received as a result of the search is determined. Credentials of each contributor are received. For each received document, a determination is made of (i) a credential score for each credential of the contributor with respect to the subject of the document and (ii) a ranking score of the contributor on the subject of the document. The ranking score is determined based on the credential scores. The received documents are filtered, by using the ranking scores, to remove at least one document from the received documents, resulting in a set of remaining documents. The set of remaining documents are returned to the requester.