<http://schema.org/keywords>
"canarias, espa\u00C3\u00B1a, lanzarote, lugares, timanfaya, volc\u00C3\u00A1n, volcano, canarys, spain"^^<http://www.w3.org/2001/XMLSchema#string>
<https://marketplace.500px.com/photos/3729368/volcanic-zone-by-mart%25C3%25ADn-p%25C3%25A9rez>