PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Phenolphthalein is an indicator that changes color depending on the pH of the solution it is in.
http://www.w3.org/ns/prov#wasQuotedFrom
  • sciencebuddies.org