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: NEW SUPERHEROES & VILLAINS 
Clue: So strong an NBA Award is named for him, in a time of crisis, he's the first reserve off the bench; make way for the...

Answer: sixth man


Question: Category: NONFICTION 
Clue: This minister's "The Purpose-Driven Life" was the top nonfiction bestseller of both 2003 & 2004

Answer: rick warren


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

Answer:
enamel