Complex sentence: Count Gerolf received as a reward for his role in the defeat of the Vikings, the East Fancian King Arnulf of Carinthia on August 4 889, a number of goods in full ownership.
Split into simpler sentences: Count Gerolf received a reward for his role in the defeat of the Vikings. The East Francian King Arnulf of Carinthia on August 4 889, gave him a number of goods in full ownership.