Complex sentence: In 1842, Charles Carpenter (son-in-law of Datus Kelley) of Norwich, Connecticut began growing and harvesting grapes for wine on Kelleys Island; by the early 1900s, the island was annually producing 500,000 gallons of wine per year.
Split into simpler sentences: In 1842, Charles Carpenter (son-in-law of Datus Kelley) of Norwich, Connecticut began growing and harvesting grapes on Kelleys Island. By the early 1900s, the island was annually producing 500,000 gallons of wine per year.