<http://schema.org/keywords>
"flowers, leaves, petals, white, backgrounds, nature, season, flora, purple, blooming, plant, beauty, greener, meadow, green, floral, tiny, clearing, seasonal, life, grass, coloured, elegant, uncultivated, small, ornamental, wood, forest, violet"^^<http://www.w3.org/2001/XMLSchema#string>
<https://marketplace.500px.com/photos/6220969/spring-flower-by-viktor-korostynski>