<http://schema.org/keywords>
"city, urban, taxi, fence, brick, new york city, nyc, graffiti, manhattan, motion blur, barbed wire, chelsea, trucks, dumpster"^^<http://www.w3.org/2001/XMLSchema#string>
<https://marketplace.500px.com/photos/10451009/new-york-city-rush-by-josh-ferris>