Complex sentence: SS "West Gate" was a steam-powered for the as part of the "West" boats, a series of steel-hulled cargo ships built on the West Coast of the United States for the World War I war effort.
Split into simpler sentences: SS "West Gate" was one of the steam-powered "West" boats that were built for the. They were steel-hulled cargo ships built on the West Coast of the United States for the World War I war effort.