{"version":"1.0","provider_name":"National History Day","provider_url":"https:\/\/nhd.org\/zh","author_name":"NHD Openbox","title":"Winners of the 2021 National History Day National Contest\u00a0 - National History Day","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"KEn7zumrOG\"><a href=\"https:\/\/nhd.org\/zh\/2021\/06\/22\/contest-winners-2021\/\">2021\u5e74National History Day\u5168\u56fd\u5927\u8d5b\u83b7\u5956\u540d\u5355\u00a0<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/nhd.org\/zh\/2021\/06\/22\/contest-winners-2021\/embed\/#?secret=KEn7zumrOG\" width=\"600\" height=\"338\" title=\"\u300a2021\u5e74National History Day\u5168\u56fd\u5927\u8d5b\u83b7\u5956\u540d\u5355\u300b\u2014National History Day\" data-secret=\"KEn7zumrOG\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script type=\"text\/javascript\">\n\/* <![CDATA[ *\/\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\/\/# sourceURL=https:\/\/nhd.org\/wp-includes\/js\/wp-embed.min.js\n\/* ]]> *\/\n<\/script>","description":"More than 400 historians and education professionals served as judges for middle and high school student's research projects. As with all other aspects of the contest this year, the judging was conducted remotely online. More than 100 students from across the country will receive cash prizes between $500 and $2,000, each, for superior work in specific judging categories.","thumbnail_url":"https:\/\/nhd.org\/wp-content\/uploads\/2022\/09\/NHD_2022_SocialImage.jpg","thumbnail_width":1200,"thumbnail_height":631}