Complex sentence: St. John got a second chance at solo stardom starting in 1919 with Paramount and the early Warner Bros. studio but principally with Fox and Educational, starring in more than 70 2-reel comedies through 1932.
Split into simpler sentences: St. John got a second chance at solo stardom starting in 1919 with Paramount Pictures and the early Warner Bros. studio, and this led to extended series of 2-reel comedies for Fox Film Corporation and Educational Pictures. Al St. John starred in more than 70 2-reel comedies through 1932.