PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Hydrogen is used in refineries to convert heavy crude oils into cleaner-burning gasoline; in metal processors to reduce metal oxides and prevent oxidation; in the chemical industry to synthesise compounds such as ammonia; and most recently in fuel cells powering ultra-low-emission cars, buses, locomotives, aircraft, and even submarines.
http://www.w3.org/ns/prov#wasQuotedFrom
  • renewableenergyfocus.com