PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The Attensity Pipeline collects data from more than 550 million social media and online sources including Twitter, Facebook and Google Plus posts, YouTube, Reddit, blogs, forums, and video and review sites.
http://www.w3.org/ns/prov#wasQuotedFrom
  • attensity.com