"material"=>"concrete","artist_name"=>"Semna van Ooy","description"=>"http://semnavanooy.nl/projects/herinnering-aan-een-plek-een-beeld-voor-een-bos/","artwork_type"=>"sculpture"
"start_date"=>"2008","artist_name"=>"Marten Grupstra","artwork_type"=>"statue"