Complex sentence: Godfrey was a native of Leuven and was chaplain to Adeliza of Louvain, second wife of King Henry I of England before and after her marriage to the king.
Split into simpler sentences: Godfrey was a native of Leuven and was chaplain to Adeliza of Louvain, second wife of King Henry I of England. Godfrey served as chaplain both before and after her marriage to the king.