{"type":"rich","version":"1.0","title":"Programmaboekje Open Monumentendag Utrecht 2026","provider_name":"Heyzine","provider_url":"https:\/\/heyzine.com","html":"<iframe allowfullscreen=\"allowfullscreen\" allow=\"clipboard-write\" scrolling=\"no\" class=\"fp-iframe\" style=\"width: 100%; height: 600px;\" src=\"https:\/\/heyzine.com\/flip-book\/66c9e977d7.html\"><\/iframe>","width":1920,"height":2693,"thumbnail_url":"https:\/\/cdnm.heyzine.com\/files\/uploaded\/66c9e977d7a34e0dc0ab5b880d9d14844cd4abaa.pdf-thumb.jpg","thumbnail_width":1400,"thumbnail_height":1964}