Complex sentence: The Kabul-Kandahar highway is 483-kilometer (300-mile) road that links Afghanistan's two largest cities, Kabul and Kandahar, and is a key portion of Afghanistan's national road system (also known as the "Ring Road").
Split into simpler sentences: The Kabul-Kandahar highway is 483-kilometer (300-mile) road that links Afghanistan's two largest cities, Kabul and Kandahar. This key portion of Afghanistan's national road system (also known as the "Ring Road").