<http://schema.org/image>
<http://cdn1.tnwcdn.com/wp-content/blogs.dir/1/files/2011/11/2327622517_b7ef06586a_z-520x245.jpg>
<http://thenextweb.com/apps/2011/11/21/skychalk-lets-you-leave-notes-on-a-map-anywhere-in-the-world/>