Complex sentence: In late 11th century, a knight from Burgundy, named Henry descendant from the king of France Robert II, was in search of adventures in Hispania and he fights the Moors along with Alfonso VI of Leon.
Split into simpler sentences: In late 11th century, a knight from Burgundy, named Henry, a descendant of the king of France Robert II, was in search of adventures in Hispania. He fights the Moors along with Alfonso VI of Leon.