Question: The 1956 Ballon d'Or was awarded to which player who was the first to receive a knighthood while still active?
Sentence (from "Stanley Matthews"): Often regarded as one of the greatest players of the British game, he is the only player to have been knighted while still playing football, as well as being the first winner of both the European Footballer of the Year and the Football Writers' Association Footballer of the Year awards.
Relevant evidence: Yes