1. A method for supplementing a web graph of linked web documents, the method comprising: identifying an existing web graph of linked web documents; identifying one or more experts for one of one or more categories; identifying one or more documents tagged by the one or more experts for the given category; determining a corresponding category of the one or more web documents tagged by the one or more experts for the given category; assigning a proxy web document to each one of the one or more experts identified for the given category; and linking the one or more proxy web documents to the one or more web documents in the existing web graph tagged by the expert corresponding to the given category for which the expert and an expert for.