<http://schema.org/keywords>
"black and white, zebra, animal, stripes, canon, eos 7d, 70-200, christian, morgenstern, leipzig, zoo, Animal, Leipzig, Zebra, animals, germany, greyscale, monochrome, pattern, summer"^^<http://www.w3.org/2001/XMLSchema#string>
<https://marketplace.500px.com/photos/8756715/zebra-by-christian-morgenstern>