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: WANNA BET? 
Clue: In the '50s, Edward Thorp fed millions of hands of this game into a computer which figured out how to win at it

Answer: blackjack


Question: Category: ALL ABOUT TROMBONES 
Clue: The most common trombone bears the name of this male singing voice

Answer: tenor


Question: Category: THE THIRD CATEGORY 
Clue: Women's pregnancy terms are divided into thirds called these

Answer:
trimesters