Complex sentence: Keo Nakama (May 21,1920-September 8,2011) was an American swimmer whose career included a world record 20:29 in the mile swim, Big Ten Conference titles at Ohio State, and numerous national and international victories.
Split into simpler sentences: Keo Nakama (May 21,1920-September 8,2011) was an American swimmer. His swimming career included a world record 20:29 in the mile swim, Big Ten Conference titles at Ohio State, and numerous national and international victories.