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: EUROPEAN PRINCESSES 
Clue: On July 20, 1999 she gave birth to her fourth child, Princess Alexandra of Hanover
[EX A]: princess caroline of monaco

[EX Q]: Category: FOOD & DRINK 
Clue: Before the introduction of Diet Coke, this was he leading diet soft drink in the U.S.
[EX A]: tab

[EX Q]: Category: ART 
Clue: The Italian name of this 15th century masterpiece is "L'Ultima Cena"
[EX A]:
\"the last supper\"