instruction:
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.
question:
Which country does tennis player Marcelo Rios come from?
answer:
chile


question:
What physical actress starred alongside John Travolta in Grease?
answer:
olivia newton-john


question:
In June 1957, John Diefenbaker became Prime Minister of which country?
answer:

canada