"Ralph Greenley Johnstone"@en . . . . "Johnstone, Ralph"@en . "1880-09-18Z"^^ . "1910-11-17Z"^^ . "Ralph Greenley Johnstone"@en . "American performer" . "Ralph Greenley Johnstone (September 18, 1880 \u2013 November 17, 1910) was the first American pilot to die in an airplane crash. He and Archibald Hoxsey were known as the \"heavenly twins\" for their attempts to break altitude records."@en . . . "1910Z"^^ . "1886Z"^^ . "1880Z"^^ .