Detailed Instructions: 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: THEATRE 
Clue: The 1996 musical "Play On!" gets its title from the first line of this Shakespeare play, on which it is based
A:
\"twelfth night\"