PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Acoustic pulses, particularly sound at low frequencies i.e. less than a few hundred Hz, are conducted very efficiently and can travel great distances in the ocean if they are trapped in this acoustic wave guide channel.
http://www.w3.org/ns/prov#wasQuotedFrom
  • collectspace.com