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.

[EX Q]: Category: EUROPEAN VACATION 
Clue: While in Rome, it's possible to stand with one foot in each of these countries
[EX A]: italy & vatican city

[EX Q]: Category: WHERE WERE YOU IN WORLD WAR II? 
Clue: Co-president, then sole president, of the French Committee of National Liberation
[EX A]: charles de gaulle

[EX Q]: Category: PHYSICAL SCIENCE 
Clue: -273.15 degrees C.
[EX A]:
absolute zero