"artist_name"=>"Klaus Grosskopf","artwork_type"=>"sculpture"
"start_date"=>"2001","artist_name"=>"Gerard van Hulzen","artwork_type"=>"sculpture"
"artist_name"=>"Henk Belkega","artwork_type"=>"statue","start_date"=>"1971"
"artist_name"=>"Peter Hiemstra","artwork_type"=>"sculpture"
"start_date"=>"2001","artwork_type"=>"sculpture"