Complex sentence: While at the Making Turners workshop he began a show with Chicago-based writer Jack Helbig that became "The Girl, the Grouch, and the Goat," which has had professional productions in Los Angeles and Chicago.
Split into simpler sentences: While at the Making Turners workshop he began a show with Chicago-based writer Jack Helbig that became THE GIRL, THE GROUCH, AND THE GOAT. THE GIRL, THE GROUCH, AND THE GOAT has had professional productions in Los Angeles and Chicago.