<http://schema.org/keywords>
"lanzarote, puerto del carmen, canarias, arco iris, rainbow, espa\u00C3\u00B1a, spain, canarys"^^<http://www.w3.org/2001/XMLSchema#string>
<https://marketplace.500px.com/photos/3777858/rainbow-by-mart%25C3%25ADn-p%25C3%25A9rez>