Complex sentence: Shepard Kollock, Jr. (September 1750--July 28,1839) was an editor and printer, who was active in colonial New Jersey during the period of the American Revolutionary War and held various government positions in the state of New Jersey during the early 1800s.
Split into simpler sentences: Shepard Kollock, Jr. (September 1750--July 28,1839) was an editor and printer, who was active in colonial New Jersey during the period of the American Revolutionary War. He also held various government positions in the newly-founded state of New Jersey during the early 1800s.