"material"=>"steel","start_date"=>"1999","artist_name"=>"Nico Betjes","artwork_type"=>"sculpture"
"material"=>"steel","start_date"=>"2014","artist_name"=>"Nico Betjes","artwork_type"=>"sculpture"
"material"=>"steel","start_date"=>"2014","artist_name"=>"Nico Betjes","artwork_type"=>"sculpture"
"start_date"=>"2003","artist_name"=>"Niko de Wit","artwork_type"=>"sculpture"