PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Because it is extracted from oil sands instead of in its liquid form, tar sand oil is a mixture of sand, oil and fluids from the extraction process.
http://www.w3.org/ns/prov#wasQuotedFrom
  • theprogressivecynic.com