Complex sentence: This marriage was intended to cement the relationship between the Ludowingians dynasty and the House of Hohenzollern and help Emperor Barbarossa in his conflict with Duke Henry the Lion of the House of Guelph.
Split into simpler sentences: This marriage was intended to cement the relationship between the Ludowingians dynasty and the House of Hohenzollern. The should help Emperor Barbarossa in his conflict with Duke Henry the Lion of the House of Guelph.