<http://schema.org/thumbnailUrl>
<http://www.imore.com/sites/imore.com/files/styles/thumbnail/public/images/stories/2010/07/letterman-iphone.png?itok=oNtc37mX>
<http://www.imore.com/letterman-top-gear-microsoft-poke-fun-iphone-4-antenna-issue>