PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • This challenge is an opportunity for students to complete a scientific investigation related to NASA's efforts to return to the moon by 2020.
http://www.w3.org/ns/prov#wasQuotedFrom
  • vtspaceeducation.org