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 consistency, answers should be in all lower cased letters.

[EX Q]: Category: WATCHMAKER, WATCHMAKER 
Clue: In 1924 England's John Harwood patented a watch that could do this to itself thanks to an internal swinging weight
[EX A]: wind itself

[EX Q]: Category: "B" & "O" 
Clue: They play home games at Camden Yards
[EX A]: baltimore orioles

[EX Q]: Category: NONFICTION 
Clue: In "History of My Calamities", he wrote about his tragic romance with Heloise
[EX A]:
abelard