<http://schema.org/thumbnailUrl>
<https://drscdn.500px.org/photo/17400381/w%3D160_h%3D160_s%3D1/344414927d93f3b9377c5445abf0c081>
<https://marketplace.500px.com/photos/17400381/cool-shadows-on-the-warm-body-by-mikhail-krylov>