<http://schema.org/thumbnailUrl>
<https://drscdn.500px.org/photo/21725417/w%3D160_h%3D160_s%3D1/37922e0ab5080b2732bbd7e7a8226027>
<https://marketplace.500px.com/photos/21725417/afternoon-in-the-city-by-romina-kutlesa->