PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • installation of boilers, overhead hoists and cranes, blast furnaces, brick kilns, fractionating towers, overhead traveling cranes, shipways, and similar types of structures;
http://www.w3.org/ns/prov#wasQuotedFrom
  • census.gov