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: WRITERS 
Clue: A memorial window near his grave at Winchester Cathedral was a gift from the fishermen of England & America
[EX A]: izaak walton

[EX Q]: Category: U.S. HISTORY 
Clue: The day affer the 15th Amendment took effect, Thomas Peterson became the 1st Afr. American to do this under its provisions
[EX A]: vote

[EX Q]: Category: ROYALTY 
Clue: This king was the great-grandfather of France's King Louis XV
[EX A]:
louis xiv