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: BRITISH LEGENDARY POETRY 
Clue: The first edition of this collection of poems did not include "The Last Tournament"; it was added in the 1870s

A: idylls of the king
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Q: Category: RECENT BOOKS 
Clue: "American Vertigo" by philosopher Bernard-Henri Levy retraced a trip 175 years before by this man, his countryman

A: alexis de tocqueville
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Q: Category: ASTRONOMY 
Clue: With a mass of 4.31 millions Suns, Sagittarius A* is thought to be a supermassive one of these in the Milky Way's center

A:
black hole
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