<http://schema.org/thumbnailUrl>
<https://drscdn.500px.org/photo/30341019/w%3D160_h%3D160_s%3D1/d2fe3020f52a0b62e186771656200151>
<https://marketplace.500px.com/photos/30341019/sshhh-be-wewy-wewy-quiet-he-s-hunting-wabbits-by-tom-maxim>