"American artist, sculptor and photographer" . . . "2011Z"^^ . . . "Dennis Oppenheim (September 6, 1938 \u2013 January 21, 2011) was an American conceptual artist, performance artist, earth artist, sculptor and photographer"@en . "1938-09-06Z"^^ . . . "Dennis Oppenheim"@en . . . . . "1938Z"^^ . . . "2011-01-21Z"^^ . "Oppenheim, Dennis"@en .