Complex sentence: It is part of the 4 Deserts, a series of footraces across the most forbidding deserts in the world including the Gobi Desert in China, the Sahara Desert in Egypt, the Atacama Desert in Chile and Antarctica.
Split into simpler sentences: It is part of the 4 Deserts, a series of footraces across the most forbidding deserts in the world. Other races in the series are held in the Gobi Desert in China, the Sahara Desert in Egypt, and Antarctica.