"1927-07-22Z"^^ . "2015-01-24Z"^^ . . "Johan Martin Jacobsen"@en . "2015Z"^^ . "Johan Martin Ferner (n\u00E9 Johan Martin Jacobsen; 22 July 1927 \u2013 24 January 2015) was a Norwegian sailor and Olympic medalist. He won a silver medal in the 6 metre class with the boat Elisabeth X at the 1952 Summer Olympics in Helsinki, together with Finn Ferner (his brother), Erik Heiberg, Tor Arneberg and Carl Mortensen. He was married to Princess Astrid, the sister of King Harald V of Norway. He was also the brother-in-law of Princess Ragnhild."@en . . "1927Z"^^ . . . . . . . "Johan Martin Ferner"@en . "Ferner, Johan Martin"@en . "Norwegian businessman and yachter" .