<http://schema.org/thumbnailUrl>
<http://cdn1.tnwcdn.com/wp-content/blogs.dir/1/files/2013/07/developer21-520x245.jpg>
<http://thenextweb.com/dd/2013/07/23/detailed-psds-of-some-of-the-webs-most-popular-sites-you-can-download-them-here/>