Complex sentence: The city's early industrial growth was a result of Ohio's pig iron industry and, particularly, the 1854 charter of the Kentucky Iron, Coal, and Manufacturing Company by the Kentucky General Assembly.
Split into simpler sentences: The city's early industrial growth was a result of Ohio's pig iron industry. It was not until 1854 that growth began to occur, with the charter of the Kentucky Iron, Coal and Manufacturing Company by the Kentucky General Assembly.