Complex sentence: His wife was previously married to Godfrey of Hainaut, Count of Ostervant, son of Baldwin IV, Count of Hainaut and Alice of Namur, who died on 7 April 1163, while preparing for a journey to Palestine.
Split into simpler sentences: His wife was previously married to Godfrey of Hainaut, Count of Ostervant. Godfrey had died on 7 April 1163, while preparing for a journey to Palestine.