Complex sentence: Mahoney appeared in episode 5 season 11, of "Cheers" as an inept jingle writer named Sy Flembeck, which includes a brief conversation with Frasier Crane (Kelsey Grammer).
Split into simpler sentences: Mahoney appeared in episode 5 season 11, of "Cheers" as an inept jingle writer named Sy Flembeck. His appearance included a brief conversation with Frasier Crane (Kelsey Grammer).