Complex sentence: It contains more than 600 Commonwealth war graves from the World Wars; 471 from World War I, including more than 300 Canadians, and 81 from World War II, including one unidentified British soldier and a Polish war grave.
Split into simpler sentences: It contains more than 600 Commonwealth war graves from the World Wars. There are buried 81 from World War II, including one unidentified British soldier and a Polish war grave.