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.

Q: Category: WORLD LITERATURE 
Clue: A war described in this 1726 novel began over an argument about how to crack open an egg

A: \"gulliver\'s travels\"
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Q: Category: EUROPEAN PRINCESSES 
Clue: On July 20, 1999 she gave birth to her fourth child, Princess Alexandra of Hanover

A: princess caroline of monaco
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Q: Category: 19th CENTURY BOOKS 
Clue: Its author called it "a Ghostly little book... which shall not put my readers out of humour... with the season"

A:
a christmas carol
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