<http://schema.org/thumbnailUrl>
<https://drscdn.500px.org/photo/14834547/w%3D160_h%3D160_s%3D1/beef64e81e6959768f184d7e5c798904>
<https://marketplace.500px.com/photos/14834547/ready-for-flying-by-geir-magne-s%25C3%25A6tre>