Given the task definition and input, reply with output. You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For consistency, answers should be in all lower cased letters.

Category: AFRICAN AMERICANS
Clue: Starting in 1927, this "noble" man's big band broadcast on radio from Harlem's Cotton Club
duke ellington