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: PLAYBILL 
Clue: This musical's "American Dream" ended on B'way after 4,097 performances--& a lot of helicopter flights
miss saigon

Category: BUSINESS & INDUSTRY 
Clue: In 1926 the Peet Bros. merged their soap company with this one, which then merged with Colgate
palmolive

Category: FRED ASTAIRE FILMS 
Clue: Appropriate title question of this 1937 Fred Astaire-Ginger Rogers film

shall we dance?