PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • I would still like to read a practical sketch of a plan to fly humans to Mars and back including radiation shielding and launch weight figures.
http://www.w3.org/ns/prov#wasQuotedFrom
  • economist.com