PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The White House Central File subject category HI (Highways-Bridges) is designated for materials pertaining to public roads, such as streets, highways, expressways, turnpikes, freeways, parkways, bridges, tunnels, over and underpasses, sidewalks, routes and markers.
http://www.w3.org/ns/prov#wasQuotedFrom
  • nixonlibrary.gov