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: FORBES' RICHEST PEOPLE 
Clue: Worth $53.5 billion, Carlos Slim, owner of Telmex, became the first person from this country to top the Forbes list
answer:
mexico


question:
Category: "BOOT" CAMP 
Clue: It's a common name for a Wild West cemetery
answer:
boot hill


question:
Category: SCIENCE GUYS 
Clue: At a 1944 auction a copy of his paper on the special theory of relativity brought a $6.5-mil. pledge in war bonds
answer:

einstein