PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The Northern Gulf of Mexico???s hypoxic (oxygen-deficient) waters represent one of the Western Hemisphere???s largest ???dead zones??????areas where lack of oxygen kills fish, crabs, and other marine life.
http://www.w3.org/ns/prov#wasQuotedFrom
  • usda.gov