<http://schema.org/category>
"web ready license"^^<http://www.w3.org/2001/XMLSchema#string>
<https://marketplace.500px.com/photos/21999675/%25D0%25A2%25D0%25B5%25D0%25B0%25D1%2582%25D1%2580-%25D1%2580%25D1%2583%25D1%2581%25D1%2581%25D0%25BA%25D0%25BE%25D0%25B3%25D0%25BE-%25D0%25B1%25D0%25B0%25D0%25BB%25D0%25B5%25D1%2582%25D0%25B0-talarium-et-lux-by-dima-stukalov>