<http://schema.org/thumbnailUrl>
<http://www.imore.com/sites/imore.com/files/styles/thumbnail/public/field/image/2012/12/apple_best_apps_hero.jpg?itok=Tomm8nzm>
<http://www.imore.com/apple-s-app-store-crashes-through-40-billion-app-downloads-mark>