"1894-12-13Z"^^ . . "1894Z"^^ . "1965-01-20Z"^^ . "Austro-Hungarian Empire" . . "1965Z"^^ . . "Friedrich (Frigyes) Hefty was a World War I Hungarian flying ace credited with five confirmed and five unconfirmed aerial victories who held the rank of Offiziersstellvertreter."@en . . "Hefty, Friedrich"@en . . "Austro-Hungarian flying ace" . "Frigyes Hefty"@en . .