PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Suitable electrically conductive materials for use as electrodes include metals, metal alloys, metal nitrides, oxides, sulfides, carbon, and polymers, including for example: aluminum (Al), silver (Ag), copper (Cu), titanium (Ti), tungsten (W), their alloys and nitrides, amorphous carbon, transparent oxides, transparent sulfides, and organic polymers.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com