<http://schema.org/thumbnailUrl>
<http://cdn1.tnwcdn.com/wp-content/blogs.dir/1/files/2012/12/111926397-520x245.jpg>
<http://thenextweb.com/google/2012/12/14/google-pushes-18-new-google-features-focusing-on-mobile-photos-events-and-hangouts/>