PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The half-life in air is dependent on a variety of factors including temperature and concentration but is generally at least several minutes or hours.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com