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.
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Question: Category: MR. AND MRS. SMITH 
Clue: An annual festival in Sydney, Australia honors Maria Smith, the originator of this famous apple

Answer: the granny smith apple


Question: Category: HEAVY MACHINERY 
Clue: By definition it's a machine that gives a surface an even degree of slope

Answer: grader


Question: Category: PLACES TO PAY IN PESOS 
Clue: Use pesos to pay for the CD of "Evita" in La Plata in this country

Answer:
argentina