Complex sentence: Frequently working with David Kohan, Mutchnick got his start writing for game shows and "The Wonder Years", and created the successful series "Will & Grace" with Kohan in 1998.
Split into simpler sentences: Frequently working with David Kohan, Mutchnick got his start writing for game shows and "The Wonder Years". He created the successful series "Will & Grace" with Kohan in 1998.