PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Refiners and entrepreneurs will have plenty of time -- and economic incentive -- to make inexpensive biofuels, hydrogen-based fuels, even ethanol from such cellulosic materials as switchgrass.
http://www.w3.org/ns/prov#wasQuotedFrom
  • phys.org