<http://schema.org/thumbnailUrl>
<http://cdn1.tnwcdn.com/wp-content/blogs.dir/1/files/2013/06/144147602-1-520x245.jpg>
<http://thenextweb.com/facebook/2014/01/22/facebook-starts-testing-ads-mobile-apps-works-directly-advertisers-mobile-ad-network/>