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 consistency, answers should be in all lower cased letters.
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Question: Category: THE DIRECTOR
Clue: Born in this city in 1895, J. Edgar Hoover graduated from its National University law school in 1917

Answer: washington

Question: Category: CAN'T SMILE WITHOUT YOU
Clue: It's the hard outer layer of a tooth

Answer: enamel

Question: Category: GOING TO THE DOGS
Clue: In ancient times the Celts used these tallest dogs in battle to pull enemies from their horses

Answer:
the irish wolfhounds