<http://schema.org/keywords>
"afternoon, bridge, clouds, coast, concrete, costanera, horizontal, iron, parana, pier, posadas, reflections, river, sky, sunset, water, Argentina, Misiones, Posadas, built structure, dock, footbridge, jetty, landscape_nature, nature, ocean, perspective, reflection, sea, seascape, sunny, view, walkway, wooden"^^<http://www.w3.org/2001/XMLSchema#string>
<https://marketplace.500px.com/photos/22942839/iron-and-concrete-by-pablo-reinsch>