Complex sentence: Forte was a member of The Groundlings and a comedic staff writer on the television series, his three television debut was on "Jenny", "Late Show with David Letterman", the short-lived comedies "Action" and "The Army Show".
Split into simpler sentences: Forte was a member of The Groundlings and a comedic staff writer on television series. His television debut was on "Jenny", "Late Show with David Letterman", the short-lived comedies "Action" and "The Army Show".