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: PHILOSOPHY 
Clue: This ancient philosopher wrote about a theory of forms in his "Republic"
[A]: plato


[Q]: Category: BEFORE, DURING & AFTER 
Clue: The "holy" first pope is in this '60s folk trio also including this actress who was "America's Sweetheart"
[A]: pope peter paul and mary pickford


[Q]: Category: OPERA & BALLET 
Clue: A governess fears that her charges are communicating with ghosts in an opera based on this Henry James novella
[A]:
the turn of the screw