@prefix rdf: . @prefix prov: . = { rdf:type prov:Entity ; prov:value "If it is necessary to come into contact with toxic chemicals while at work it is necessary to use protective measures such as gloves, goggles and or masks to protect our skin and our internal systems as well." ; prov:wasQuotedFrom . prov:wasDerivedFrom . prov:wasDerivedFrom . }