PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Heavy metals, such as lead and arsenic are being regulated, but ongoing safety violations by public utilities in overall water quality show that not enough is being done to ensure these pollutants are removed today from your drinking water.
http://www.w3.org/ns/prov#wasQuotedFrom
  • efilterwater.com