instruction:
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 simplicity, answers should be in all lower cased letters.
question:
Category: 1960s TV 
Clue: First aired on September 30, 1963, "Opie the Birdman" has become a classic episode of this sitcom
answer:
the andy griffith show


question:
Category: FAMOUS FOLKS 
Clue: During WWII this Geodesic Dome inventor headed mechanical engineering for the Board of Economic Warfare
answer:
buckminster fuller


question:
Category: "R"RRRRRRRRR 
Clue: Ionesco play that ends, "I'm the last man left, and I'm staying that way until the end.  I'm not capitulating!"
answer:

rhinoceros