<http://schema.org/keywords>
"helmet, fire extinguisher, fence, Helm, Feuerl\u00F6scher, Zaun, casque, extincteur, d'une cl\u00F4ture, capacete, extintor de inc\u00EAndio, cerca"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.bibliocad.com/library/safety-at-work_43199>