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: FICTIONAL CHARACTERS 
Clue: A 1965 novel by this author introduced his alter ego, sci-fi writer Kilgore Trout

Answer: kurt vonnegut, jr.


Question: Category: WORLD LEADERS 
Clue: Unopposed, he was elected to his 5th term as president in 1998; he's been in power since 1959

Answer: fidel castro


Question: Category: NATIONAL HOLIDAYS 
Clue: June 23, National Day in this country, began as a celebration of the birthday of Grand Duchess Charlotte

Answer:
luxembourg