Complex sentence: Shaffer began his music career in 1972 as the musical director for the Toronto production of "Godspell", starring Victor Garber, Gilda Radner, Martin Short, Eugene Levy, Dave Thomas and Andrea Martin.
Split into simpler sentences: Shaffer began his music career in 1972 as the musical director for the Toronto production of "Godspell". The production starred Victor Garber, Gilda Radner, Martin Short, Eugene Levy, Dave Thomas and Andrea Martin.