. . "2007-01-04Z"^^ . "John Wistar Simpson (25 September 1914 \u2013 January 4, 2007) was an electrical engineer, who made significant contributions to the development of the nuclear energy."@en . "2007Z"^^ . "John Wistar Simpson"@en . "American electrical engineer" . "Simpson, John W."@en . "1914-09-25Z"^^ . "1914Z"^^ .