. "1919Z"^^ . "2007Z"^^ . "Walton, Helen"@en . . "Helen Robson Kemper"@en . "Helen Robson Kemper Walton (December 3, 1919 \u2013 April 19, 2007) was the wife of Wal-Mart and Sam's Club founder Sam Walton. At one point in her life, she was the richest American and the eleventh-richest woman in the world."@en . . . . . "Helen Walton"@en . "1.64E10"^^ . . . "American politician" . . "2007-04-19Z"^^ . "1919-12-03Z"^^ .