Complex sentence: Harold Stirling Vanderbilt (July 6,1884--July 4,1970) was a member of the prominent United States Vanderbilt family who was a railroad executive, a champion yachtsman and a champion bridge player.
Split into simpler sentences: Harold Stirling Vanderbilt (July 6,1884--July 4,1970) was a member of Vanderbilt family. He was a railroad executive, a champion yachtsman and a champion bridge player.