PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • In some cases, particularly for deaths and marriages that occurred from the mid-1950s to the early 1990s, some of the F (Free Press) and S (Standard) references are not accompanied by a date.
http://www.w3.org/ns/prov#wasQuotedFrom
  • burlingtonhistory.org