<http://schema.org/image>
<https://drscdn.500px.org/photo/27934305/w%3D600_s%3D1/5cf4d50120e1fc363a87e3f58426f246>
<https://marketplace.500px.com/photos/27934305/white-wagtail-motacilla-alba-yarellii-by-gyorgy-szimuly>