<http://schema.org/image>
<https://drscdn.500px.org/photo/23313743/w%3D600_s%3D1/2e302ca50393ff63ea783c6c86c93684>
<https://marketplace.500px.com/photos/23313743/birsay-beach-marwick-head-orkney-isles-scotland-by-heather-leslie-ross>