. . "Piene, Otto"@en . . . "2014Z"^^ . "1928Z"^^ . "German artist" . "Otto Piene (18 April 1928 \u2013 17 July 2014) was a German artist. He lived and worked in D\u00FCsseldorf and Groton, Massachusetts."@en . . . "Otto Piene"@en . "2014-07-17Z"^^ . "1928-04-18Z"^^ . . . . . .