<http://schema.org/thumbnailUrl>
<http://www.imore.com/sites/imore.com/files/styles/thumbnail/public/field/image/2014/04/prom_apps_iphone_hero.jpg?itok=SKbG8XBH>
<http://www.imore.com/best-prom-apps-iphone-opentable-asos-proflowers-and-more>