Conversation so far:
What was Sinatra's first debut?
Las Vegas Nights.
What was his first musical film?
Anchors Aweigh.
What was another of Sinatra's musical films?
Till the Clouds Roll By.
Why did Sinatra's career slump?
he was rarely enthusiastic towards his own acting.
Were there other reasons for his career slump?
Meet Danny Wilson (1952) failed to make an impression.
Who were some of the people Sinatra worked with on his films?
Gene Kelly and Kathryn Grayson.
What was another one of his musical films?
Take Me Out to the Ball Game.
What was one of the songs Sinatra sang in the musical films?
"I'll Never Smile Again.

Question: Who else did Sinatra work with?
Self-contained rewrite: Who else did Sinatra work with other than Gene Kelly and Kathryn Grayson?