PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Matters of public concern and controversy that are taught, often through discussion, in social studies, current events, science, and other classes.
http://www.w3.org/ns/prov#wasQuotedFrom
  • education.com