Complex sentence: Kansas City's first symphony orchestra was the Kansas City Symphony formed in 1911 for Carl Busch and ceased operations at the atart of World War I, as many of the musicians were sent to War.
Split into simpler sentences: Kansas City's first symphony orchestra was the Kansas City Symphony, formed in 1911 for Carl Busch. It ceased operations at the start of World War I, as many of the musicians were sent to War.