<http://schema.org/keywords>
"swiss, air, force, axalp, meiringen, alps, aviation, action, art, horent, f18, f-18, kichu, Axalp Airshow Switzerland"^^<http://www.w3.org/2001/XMLSchema#string>
<https://marketplace.500px.com/photos/4057714/avatar-by-krzysztof-baranowski>