<http://schema.org/isFamilyFriendly>
"true"^^<http://www.w3.org/2001/XMLSchema#boolean>
<https://marketplace.500px.com/photos/25721783/metro-by-%25D0%259F%25D0%25B0%25D0%25B2%25D0%25B5%25D0%25BB-%25D0%25A0%25D1%258B%25D0%25B6%25D0%25B5%25D0%25BD%25D0%25BA%25D0%25BE%25D0%25B2>