Complex sentence: He (born 1200 AD) was son of a (Central Asia) Turkic noble of the Gujjar tribe, but as a child he and others from his tribe-was captured by Mongols and sold as a slave at Ghazni.
Split into simpler sentences: He (born 1200 AD) was son of a (Central Asia) Turkic noble. As a child he and others from his tribe-were captured by the Mongols and sold as a slave at Ghazni.