Conversation so far:
When did Dean Martin's later career begin?
1974
What was one of Dean Martin's shows?
The 1974 film drama Mr. Ricco
What did the critics think of Dean Martin?
Roger Ebert of the Chicago Sun-Times gave the film one-and-a-half stars out of four.

Question: What song did he release?
Self-contained rewrite: What song did Dean Martin release?