PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Skype has, compared with other telephonyproviders, significant advantages such as low cost, better sound quality, improved security,and easy and low installation costs [14].
http://www.w3.org/ns/prov#wasQuotedFrom
  • slideshare.net