<http://schema.org/thumbnailUrl>
<http://www.imore.com/sites/imore.com/files/styles/thumbnail/public/field/image/2013/11/dogfight_ibooks_iphone_hero.jpg?itok=CXPYIzxr>
<http://www.imore.com/apple-brings-out-big-guns-ebooks-case-economists>