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: TAKE THE KIDS! 
Clue: Kids love creepy stuff, so take them to see the bog mummies at the Silkeborg Museum in this country
answer:
denmark


question:
Category: WHEN I'M 64 
Clue: 64 symbolic hexagrams make up this divinatory Chinese system
answer:

i ching