Complex sentence: John McIntosh Kell (1823--October 5,1900) was an officer in the Confederate navy during the American Civil War, during which time Kell was First Lieutenant and Executive Officer of the commerce raider.
Split into simpler sentences: John McIntosh Kell (1823--October 5,1900) was an officer in the Confederate navy during the American Civil War. During the civil War, Kell was First Lieutenant and Executive Officer of the commerce raider.