PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Though the two sites are often lumped together in the popular mind, Twitter isn???t quite a mass medium in the same way Facebook has become ??? it???s more of a channel to reach those ???network influentials??? we discussed above, since it???s particularly popular with bloggers, journalists and activists.
http://www.w3.org/ns/prov#wasQuotedFrom
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