. . "Royal Robertson (21 October 1936 \u2013 5 July 1997), also known as the self-proclaimed Prophet Royal Robertson, was an American artist."@en . . "Royal Robertson"@en . "American artist" . "1936Z"^^ . "Robertson,Royal"@en . "1997Z"^^ . "1936-10-21Z"^^ . . "1997-07-05Z"^^ .