PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Heavy metals such as lead, mercury, cadmium, chromium, barium, and arsenic have been found in soils near natural gas drilling sites.
http://www.w3.org/ns/prov#wasQuotedFrom
  • resilience.org