"artist_name"=>"Evert den Hartog","artwork_type"=>"sculpture","start_date"=>"2008"
"start_date"=>"1971","artist_name"=>"P.C. Kliphuis- Bothof","artwork_type"=>"sculpture"
"start_date"=>"1971","artist_name"=>"H. Tiedeman","artwork_type"=>"sculpture"