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: PICTURES AT AN EXHIBITION 
Clue: His 1960s works include "I Know How You Must Feel, Brad!" & "As I Opened Fire..."
[EX A]: roy lichtenstein

[EX Q]: Category: THE ENGLISH MONARCH SPEAKS 
Clue: She warned her council who were against her moves on Mary Queen of Scots, "I will make you shorter by a head"
[EX A]: elizabeth i

[EX Q]: Category: AT THE MOVIE THEATER 
Clue: Willis Carrier tested this in the Rivoli in 1925 & soon movie houses were installing & advertising it
[EX A]:
air conditioning