Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.
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Question: Which country does tennis player Marcelo Rios come from?

Answer: chile

Question: The Hudson River forms the boundary between the states of New York and what other?

Answer: new jersey

Question: Which band had a UK number one hit single with 'I'm A Believer' in 1967?

Answer:
the monkees