1. A method of advancing within a video clip of a multimedia document, the method comprising: searching first entries of an inverted index for a first annotation matching a query, each first entry having a unique first annotation and a list of document identifiers of multimedia documents having the unique first annotation; upon determining the matching first annotation, searching second entries of a positional representation corresponding to one of the document identifiers for a second annotation matching the query, each second entry having a unique second annotation and occurrence positions of the unique second annotation within a multimedia document; upon determining the matching second annotation, deriving a time within the video clip of the multimedia document corresponding to the one document identifier from an occurrence position of the second annotation, and advancing presentation of the video clip to the derived time, wherein the method is executed by a processor.
3. The method of claim 1 , wherein the query specifies a proper name.