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.

[EX Q]: Category: MATH TERMS 
Clue: The term surd refers to irrational numbers like this number's square root, 1.7320508...
[EX A]: 3

[EX Q]: Category: "X" IN THE CITY 
Clue: Famous for temple ruins, this city on the site of Thebes has been called "The World's Greatest Open-Air Museum"
[EX A]: luxor

[EX Q]: Category: ANAGRAMMED EXISTENTIAL PHILOSOPHERS 
Clue: Gee, dig her!
[EX A]:
heidegger