PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • : measure how many times twitter makes you to think about it during the day or limited time such as time for experiment or research.
http://www.w3.org/ns/prov#wasQuotedFrom
  • freakonomics.com