<http://schema.org/keywords>
"animal, butterfly, chianti, country, e-pm1, field, flower, flowers, innocenti, italia, italy, matteo, nature, olympus, pen, photography, poggio, scandicci, toscana, tuscany, castellare, valicaia"^^<http://www.w3.org/2001/XMLSchema#string>
<https://marketplace.500px.com/photos/36459342/butterfly-by-matteo-innocenti>