<http://schema.org/thumbnailUrl>
<https://drscdn.500px.org/photo/13842639/w%3D160_h%3D160_s%3D1/5a9f2f274d95d0aafb506d3f55ef57a6>
<https://marketplace.500px.com/photos/13842639/dog-by-hanson-mao-%25E6%25AF%259B%25E5%25BB%25B6%25E5%25BB%25B6->