TASK DEFINITION: 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.
PROBLEM: Category: LIFE OF PIE
Clue: An old rhyme says that this "without some cheese is like a kiss without a squeeze"

SOLUTION: apple pie

PROBLEM: Category: HOW GREAT THOU ART
Clue: This "mama's boy" answered the art critics in his 1890 book "The Gentle Art of Making Enemies"

SOLUTION: whistler

PROBLEM: Category: THE CRUSADES
Clue: In the Fourth Crusade the crusaders plundered this Byzantine capital, a Christian city

SOLUTION:
constantinople