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: The Guarani is the principal unit of currency of which country?

Answer: paraguay


Question: Which English singer/songwriter/musician wrote the Tremeloes hit 'Here Comes My Baby' at the age of eighteen?

Answer: cat stevens


Question: After a Facebook campaign to make it the number 1 UK single in December 2009, Killing In The Name by which band set a record for most downloads in a single week, selling over 500,000 copies?

Answer:
rage against the machine