Complex sentence: Involved was a Seaboard Air Line mixed freight train that derailed over the Ogeechee River, loaded butane tank cars from the train plunged into the river below and ruptured.
Split into simpler sentences: Involved was a Seaboard Air Line mixed freight train that derailed over the Ogeechee River. Loaded butane tank cars from the train plunged into the river below and ruptured.