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: TELEVISION & HISTORY
Clue: When "60 Minutes" premiered, this man was U.S. president
[A]: lyndon b. johnson

[Q]: Category: LITERARY OBJECTS
Clue: In literature from the 1200s to today, it has been depicted as a type of dish, a talismanic stone & a woman
[A]: the holy grail

[Q]: Category: FROM MOVIE TO MUSICAL
Clue: A play-within-a-play, called "Pretty Lady", suddenly needs a new leading lady in this ever-popular musical
[A]:
42nd street