instruction:
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.
question:
Category: WHAT'S THE BIG IDEA? 
Clue: The 21st century doctrine named for this man allows the U.S. to wage preventive war if an attack on us is coming
answer:
george w. bush


question:
Category: MR. BODY 
Clue: Fed by the hepatic portal veins, it weighs about a pound more in men than in women
answer:
liver


question:
Category: POTENT POTABLES 
Clue: The Harvard is made with sweet vermouth; dry vermouth is in this cocktail with the name of a Harvard rival
answer:

yale