Conversation so far:
What was something interesting Jack Benny did in this period?
becoming a national figure with The Jack Benny Program.
What was the Jack Benny program?
a weekly radio show that ran from 1932 to 1948 on NBC and from 1949 to 1955 on CBS.
did he work with anybody?
Ed Sullivan.

Question: What did he do with Ed Sullivan?
Self-contained rewrite: What did Jack Benny do with Ed Sullivan