"Bastiaan Johan Christiaan \"Bas Jan\" Ader (born 19 April 1942 \u2013 disappeared 1975) was a Dutch conceptual artist, performance artist, photographer and filmmaker. He had lived in Los Angeles, California for the last twelve years of his life. His work was in many instances presented as photographs and film of his performances. He made performative installations, including Please Don't Leave Me (1969)."@en . . . . "Ader, Bas Jan"@en . "1942Z"^^ . "Bas Jan Ader"@en . . . "Conceptual and performance artist, photographer, filmmaker" . "1942-04-19Z"^^ . . . "1975Z"^^ . . . . .