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: Known to the Danish as Godthab, what is the capital of Greenland?

Answer: nuuk


Question: Who was the first director of the FBI?

Answer:
j. edgar hoover