Complex sentence: The List of Royal Canadian Navy ships of the First World War is comprised of the surface warships, submarines and auxiliary vessels in service during the war and includes all commissioned, non-commissioned, loaned or hired ships.
Split into simpler sentences: The List of Royal Canadian Navy ships of the First World War is comprised of the surface warships, submarines and auxiliary vessels in service during the war. It includes all commissioned, non-commissioned, loaned or hired ships.