Question: What prize was won by a novel whose film adaptation starred an actor as Walter Cunningham?
Sentence (from "Crahan Denton"): One of his most famous film roles was in "To Kill A Mockingbird" where he portrays "Walter Cunningham," a client of the main character, Atticus Finch, and the leader of a mob which attempts to lynch another of Finch's clients.
Relevant evidence: Yes