<http://schema.org/isFamilyFriendly>
"true"^^<http://www.w3.org/2001/XMLSchema#boolean>
<https://marketplace.500px.com/photos/19296619/bliss-by-%25E0%25A4%25AE%25E0%25A4%25BF-%25E0%25A4%25A6%25E0%25A5%2587%25E0%25A4%25B6%25E0%25A4%25AE%25E0%25A5%2581%25E0%25A4%2596>