Conversation so far:
What interviews were done?
In The Daily Show's third act, the host conducts an interview with a celebrity guest.
Was The Daily Show's approach to interviews successful?
During Stewart's tenure, the show's guests tended away from celebrities and more towards non-fiction authors and political pundits, as well as many prominent elected officials.

Question: Who appeared on the show?
Self-contained rewrite: Who appeared on The Daily Show ?