PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Classical economists such as Say, David Ricardo, and later John Stuart Mill, however, argued that production itself was the source of ???purchasing power,??? not money.
http://www.w3.org/ns/prov#wasQuotedFrom
  • fff.org