<http://schema.org/thumbnailUrl>
<https://drscdn.500px.org/photo/24206907/w%3D160_h%3D160_s%3D1/a8cb1105e41d7cff8027d58e30763aaf>
<https://marketplace.500px.com/photos/24206907/as-tired-by-b%25C3%25BC%25C5%259Fra-hakg%25C3%25B6ren>