Conversation so far:
Did Randy Quaid participate in theater?
In 2004, Randy Quaid appeared on stage undertaking the starring role of Frank in the world premiere of Sam Shepard's The God of Hell.
Did Randy Quaid participate in any other roles?
Randy Quaid has also starred in Sam Shepard's True West.

Question: was Quaid successful?
Self-contained rewrite: Was Randy Quaid successful in Sam Shepard's The God of Hell?