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: "O" YOU ANIMAL! 
Clue: It "coughs" out sediment by clapping its shell shut
[EX A]: oyster

[EX Q]: Category: POETIC LINES 
Clue: In a famous poem, this character asks, "If I can rid your town of rats will you give me a thousand guilders?"
[EX A]: the pied piper

[EX Q]: Category: ROME 
Clue: The headliner at the San Silvestro in Rome's Capite Church is the reputed head of this saint; bring it to me!
[EX A]:
john the baptist