<http://schema.org/keywords>
"light, switch, off, b&amp;w, black and white, luz, apagar, encender, perilla, blanco y negro"^^<http://www.w3.org/2001/XMLSchema#string>
<https://marketplace.500px.com/photos/8862465/the-lit-light-switch-by-aldo-fabi%25C3%25A1n>