Complex sentence: He returned to feature length films in 1946, when Monogram Pictures launched a series of 11 low-budget films starring Joe Kirkwood, Jr. as Joe, Leon Errol as Knobby and Elyse Knox as society girl Ann Howe.
Split into simpler sentences: He returned to the screen in 1946, when Monogram Pictures launched a series of 11 low-budget films. The Monogram films starred Joe Kirkwood, Jr. as Joe, Leon Errol as Knobby and Elyse Knox as society girl Ann Howe.