Complex sentence: Mammoth Cave National Park is a U.S. National Park in central Kentucky, encompassing portions of Mammoth Cave, the longest cave system known in the world.The official name of the system is the Mammoth-Flint Ridge Cave System for the ridge under which the cave has formed.
Split into simpler sentences: Mammoth Cave National Park is a U.S. National Park in central Kentucky, encompassing portions of Mammoth Cave, the longest cave system known in the world. HIRO The official name of the system is the Mammoth-Flint Ridge Cave System for the ridge under which the cave has formed.