Conversation so far:
what did Frank sinatra do later in his career?
Due to an obligation Frank Sinatra owed to 20th Century Fox for walking off the set of Henry King's Carousel
what did Frank sinatra have to do for 20th century fox?
Fran Sinatra Sinatra starred opposite Shirley MacLaine, Maurice Chevalier and Louis Jourdan in Can-Can
was the movie with Fran Sinatra starred opposite Shirley MacLaine, Maurice Chevalier and Louis Jourdan, Can-Can a success?
The film was listed by Variety as the highest grossing film of 1960
did Frank Sinatra win any awards for the movie Can-can?
what other important things did Frank sinatra do in his later years?
Frank Sinatra directed None but the Brave,
what did the critics say about None but the Brave directed by frank sinatra?
did Frank sinatra do any others besides None but the brave?
Von Ryan's Express
what was Frank sinatra's last movie directed?

Question: why did he stop with that one
Self-contained rewrite: why did Frank sinatra stop with that one?