PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Although it has been observed that sound is preferred above silence, listening tests have shown that by repeating the same burst several times, a considerable amount of higher frequency tones, whistling sound and other noise are induced, such that this technique receives no preference above silence substitution.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com