Complex sentence: The Lackawanna Steel Company moved to the area in 1902 later, in 1909, the residents of the area voted to split off from West Seneca forming the city of Lackawanna.
Split into simpler sentences: The Lackawanna Steel Company moved to the area in 1902. Later, in 1909, the residents of the area voted to split off from West Seneca forming the city of Lackawanna.