PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Considering the complicated way in which a bowed violin string vibrates, it is not surprising that the violin is a difficult instrument to learn.
http://www.w3.org/ns/prov#wasQuotedFrom
  • maths.org