PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • t fcd???n???(1/??T)???fc???10 kHz and ???fc???20 kHz, where n is an integer.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com