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: BRITISH ROYALTY 
Clue: Before Prince Andrew, he was the last Duke of York
answer:
king george vi


question:
Category: LANDMARKS 
Clue: Some of its pieces, which weighed up to 50 tons, were quarried at Marlborough Downs, about 20 miles away
answer:
stonehenge


question:
Category: OLYMPIC CITIES 
Clue: Of all the cities to host the modern Olympic Games, this one lies closest to the equator
answer:

mexico city