<http://schema.org/thumbnailUrl>
<http://www.imore.com/sites/imore.com/files/styles/thumbnail/public/images/stories/2012/06/apple_podcast_app_hero.jpg?itok=2mQEt-Yw>
<http://www.imore.com/subscribe-podcasts-apples-podcasts-app-iphone-ipad>