Conversation so far:
When was Keith Carradine born?
Keith Ian Carradine was born August 8, 1949
Is Keith Carradine married?
Keith Carradine married Sandra Will on February 6, 1982.
Do Keith Carradine and Sandra Will have any children?
Keith Carradine married Sandra Will had two children
What are Keith Carradine children's names?
Cade Richmond Carradine and Sorel Johannah Carradine
Where was Keith Carradine born?
Keith Carradine was born in San Mateo, California

Question: Who were his parents?
Self-contained rewrite: Who were Keith Carradine's parents?