<http://schema.org/keywords>
"ritter, menschen, people, knightg, Austria, Linz, Medieval, armor, armour, costume, defeat, defeated, helmet, knight, male, medieval, men, summer"^^<http://www.w3.org/2001/XMLSchema#string>
<https://marketplace.500px.com/photos/7109768/ritter-by-leo-p%25C3%25B6cksteiner>