PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Exploration Systems will be initially responsible for developing the solar system exploration vehicles and technologies described in this plan, including the Crew Exploration Vehicle, nuclear power and propulsion systems, and necessary supporting technologies.???
http://www.w3.org/ns/prov#wasQuotedFrom
  • spacepolitics.com