PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Having valuable, sharable, non-sales-related content on the site that people will blast out on Twitter, Facebook, and other social channels adds credence to your website's overall authority in the eyes of search.
http://www.w3.org/ns/prov#wasQuotedFrom
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