Complex sentence: In 1851 the town of Seneca was formed, the name was changed to West Seneca in 1852, with the area now known as Lackawanna being called West Seneca or Limestone Hill.
Split into simpler sentences: In 1851 the town of Seneca was formed; the name was changed to West Seneca in 1852. The area now known as Lackawanna was then called West Seneca or Limestone Hill.