PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Its immediate origins lay in a mixing together of various black musical genres of the time, including rhythm and blues and gospel music, with country and western.[16] In 1951, Cleveland, Ohio disc jockey Alan Freed began playing rhythm and blues music for a multi-racial audience, and is credited with first using the phrase rock and roll to describe the music.[17]
http://www.w3.org/ns/prov#wasQuotedFrom
  • explained.at