<http://schema.org/thumbnailUrl>
<https://gigaom.com/wp-content/uploads/sites/1/2012/02/screen-shot-2012-02-16-at-1-28-04-am.png>
<http://gigaom.com/2012/02/16/with-imessage-notifications-os-x-mountain-lion-looks-more-like-ios/>