<http://schema.org/thumbnailUrl>
<http://cdn1.tnwcdn.com/wp-content/blogs.dir/1/files/2012/12/Museo-del-Prado-520x245.jpg>
<http://thenextweb.com/google/2012/12/06/google-maps-updated-in-10-european-countries-as-project-ground-truth-expands-to-40-markets/>