<http://schema.org/keywords>
"bleu, blue, col, colors, fairy, favre, froid, frost, hiking, ice, montagne, moutain, moutainering, pink, snow, twilight, view, vincent, winter"^^<http://www.w3.org/2001/XMLSchema#string>
<https://marketplace.500px.com/photos/23953897/frosty-feeling-by-vincent-favre>