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.

Category: GEORGE WASHINGTON 
Clue: In 1798 George wrote to John Greenwood, a man in this profession, "I am...ready to pay what ever you may charge me"
dentist

Category: MUSIC LEGENDS 
Clue: His 2003 People magazine obituary was headlined "Fade to Black"
johnny cash

Category: HISTORICAL PLAYS 
Clue: "If I were to dress as a woman, they would think of me as a woman... What would become of me?" is a line from this 1923 play

saint joan