<http://schema.org/keywords>
"tree, christmas, tokyo, xmas, christmas tree, ebisu, x'mas, \u00E3&#130;\u00AF\u00E3&#131;\u00AA\u00E3&#130;\u00B9\u00E3&#131;&#158;\u00E3&#130;\u00B9, \u00E3&#130;\u00AF\u00E3&#131;\u00AA\u00E3&#130;\u00B9\u00E3&#131;&#158;\u00E3&#130;\u00B9\u00E3&#131;&#132;\u00E3&#131;\u00AA\u00E3&#131;\u00BC, symbol"^^<http://www.w3.org/2001/XMLSchema#string>
<https://marketplace.500px.com/photos/17475833/tree-by-kazuya-dada>