<http://schema.org/thumbnailUrl>
<https://drscdn.500px.org/photo/16406311/w%3D160_h%3D160_s%3D1/5e60ea10ea3199888d77ebeb20451396>
<https://marketplace.500px.com/photos/16406311/-shall-we-play-a-game-by-edwin-van-nuil>