PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Nitrate is an inorganic chemical that may contaminate water by being leached from septic tanks, sewage and natural deposit erosion, as well as fertilizer use.
http://www.w3.org/ns/prov#wasQuotedFrom
  • samblackman.org