PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The most common contaminants of foods are what are known as ???heavy metals??? which include mainly mercury, lead, and cadmium.
http://www.w3.org/ns/prov#wasQuotedFrom
  • toptenz.net