PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Estimates from the various surveys or programs will almost never match (unless explicitly controlled), because of differences in such things as questionnaire content, data collection methodology, reference-period specifications, editing procedures, residency requirements, response rates, and timing of responses, as well as the coverage and rules of the unemployment insurance program.
http://www.w3.org/ns/prov#wasQuotedFrom
  • census.gov