<http://schema.org/keywords>
"world heritage, winter, house, tree, japan, snow, 2012, shirakawa-g\u00C5&#141;, Gifu pref., shirakawa-go"^^<http://www.w3.org/2001/XMLSchema#string>
<https://marketplace.500px.com/photos/20481373/heavy-snow-in-shirakawa-go-by-miyamoto-y>