Complex sentence: The Korean Demilitarized Zone (DMZ;) is a strip of land running across the Korean Peninsula; it was established at the end of the Korean War to serve as a buffer zone between North and South Korea.
Split into simpler sentences: The Korean Demilitarized Zone (DMZ;) is a strip of land running across the Korean Peninsula. It was established at the end of the Korean War to serve as a buffer zone between North and South Korea.