{"version":"1.0","provider_name":"National Choirs","provider_url":"https:\/\/nationalekoren.nl\/en","author_name":"Nationale-Koren-Editor-Translator","author_url":"https:\/\/nationalekoren.nl\/en\/author\/nationale-koren-editor-translator\/","title":"In het hart van het Mahler festival... - Nationale Koren","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"AkrJEfggD3\"><a href=\"https:\/\/nationalekoren.nl\/en\/festival\/in-het-hart-van-het-mahler-festival\/\">At the heart of the Mahler Festival...<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/nationalekoren.nl\/en\/festival\/in-het-hart-van-het-mahler-festival\/embed\/#?secret=AkrJEfggD3\" width=\"600\" height=\"338\" title=\"&#8220;In het hart van het Mahler festival&#8230;&#8221; &#8212; Nationale Koren\" data-secret=\"AkrJEfggD3\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n<\/script>","thumbnail_url":"https:\/\/nationalekoren.nl\/wp-content\/uploads\/2025\/05\/IMG_1729.jpg","thumbnail_width":1780,"thumbnail_height":1521,"description":"Het Nationaal Kinderkoor en het Nationaal Jongenskoor hebben afgelopen zondag de Derde Symfonie van Mahler meegezongen. Een jonge zanger uit het Nationaal Jongenskoor zong voor het eerst mee. Toen hij wakker werd, de dag daarna, vertelde hij zijn moeder: &#8220;Ik voel steeds zo&#8217;n soort glimlach in mijn buik als ik aan het concert denk!&#8221; Dit [&hellip;]"}