"material"=>"bronze","start_date"=>"1989-06-03","artist_name"=>"Henny Zandjans","artwork_type"=>"statue"
"material"=>"iron","start_date"=>"1969","artwork_type"=>"sculpture"
"start_date"=>"1980","artist_name"=>"Jan Kip","artwork_type"=>"statue"
"material"=>"bronze","start_date"=>"1991","artist_name"=>"Heleen Levano","artwork_type"=>"sculpture"