<http://schema.org/thumbnailUrl>
<http://www.imore.com/sites/imore.com/files/styles/thumbnail/public/images/stories/2010/09/Screen-shot-2010-09-18-at-4.25.51-PM.png?itok=l_wtu-lg>
<http://www.imore.com/gv-mobile-app-store-brings-google-voice-iphone>