PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • ???America's next step in human space exploration is an ambitious one and will require new technologies, including ways to keep our astronauts safe from the effects of deep-space radiation.
http://www.w3.org/ns/prov#wasQuotedFrom
  • lockheedmartin.com