"2012-07-31Z"^^ . . . "1939Z"^^ . . "Sydney Knowles, BEM, (3 September 1921 \u2013 31 July 2012) was a British Royal Navy frogman during and after World War II."@en . "British military scuba diver" . "1921Z"^^ . . "1950Z"^^ . "United Kingdom" . . "2012Z"^^ . "Sydney James Knowles"@en . "Knowles, Sydney"@en . "1921-09-03Z"^^ . .