Conversation so far:
When did Groucho Marx go to Hollywood?
1931
What was Groucho Marx's first movie?
Their first movie was a silent film made in 1921 that was never released, and is believed to have been destroyed at the time.
Why wasn't Groucho Marx's first movie released?
Their first movie was a silent film made in 1921 that was never released, and is believed to have been destroyed at the time.

Question: What was a movie that was released?
Self-contained rewrite: What was a Groucho Marx movie that was released?