PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Duck and Cover is a civil defense film (sometimes also characterized as a social guidance film or mischaracterized as propaganda)[1][2] produced in 1951 (but first shown publicly in January 1952) by the United States government's Federal Civil Defense Administration shortly after the Soviet Union began nuclear testing.
http://www.w3.org/ns/prov#wasQuotedFrom
  • wikipedia.org