Complex sentence: The Susquehanna River is generally considered the dividing line between the northern and southern sections of the Pennsylvania AT, south of the Susquehanna, the trail passes through Pine Grove Furnace State Park.
Split into simpler sentences: The Susquehanna River is generally considered the dividing line between the northern and southern sections of the Pennsylvania AT. South of the Susquehanna, the trail passes through Pine Grove Furnace State Park.