<http://schema.org/keywords>
"city, night, architecture, museum, ciudad, noche, museo, domus, coru\u00C3\u00B1a, portela, isozaki, galicia, spain"^^<http://www.w3.org/2001/XMLSchema#string>
<https://marketplace.500px.com/photos/12365561/domus-de-noche-by-mart%25C3%25ADn-prieto->