PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • This ???empty??? space between the nanotube and pore walls may be filled or coated with a material such as an insulator, metal oxide, polymer, or other material.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com