<http://schema.org/thumbnailUrl>
<http://www.imore.com/sites/imore.com/files/styles/thumbnail/public/field/image/2013/04/facebook_home_launch_day.jpg?itok=raUmIn7p>
<http://www.imore.com/how-test-facebook-chat-heads-and-stickers-ios-right-now-even-if-your-account-hasnt-been-enabled-them>