PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • This new proposal will give the public more information about substances such as mercury and dioxin that are particularly worrisome because they persist so long in the environment.
http://www.w3.org/ns/prov#wasQuotedFrom
  • epa.gov