<http://schema.org/keywords>
"autumn, nature, tree, brown, flight, fly, green, wood, oak, helicopter, wings, dusk, hanging, seasons, float, autumn is coming, Oak seeds, flying seeds"^^<http://www.w3.org/2001/XMLSchema#string>
<https://marketplace.500px.com/photos/8488961/autumn-is-coming-by-james-johnson>