. "1964-02-21Z"^^ . "Wrestler" . "1964Z"^^ . "Jaap Sjouwerman (27 May 1891 \u2013 21 February 1964) was a Dutch wrestler. He competed at the 1920 and the 1924 Summer Olympics."@en . . . "1891-05-27Z"^^ . "Sjouwerman, Jaap"@en . "1891Z"^^ . .