PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • VO: Kelly thought the answer lay in a strange class of materials called semiconductors, materials such as silicon and germanium, which could both conduct and resist the flow of electricity depending on the conditions.
http://www.w3.org/ns/prov#wasQuotedFrom
  • pbs.org