<http://schema.org/thumbnailUrl>
<https://drscdn.500px.org/photo/14221291/w%3D160_h%3D160_s%3D1/b088fa5f8121ed00a6e044b8fd3d1287>
<https://marketplace.500px.com/photos/14221291/rat-snake-by-arvind-balaraman>