PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • To determine whether the planet has an atmosphere, astronomers need to capture an image of the planet ??? which they have not done ??? and analyze the light for signs of water, carbon dioxide and other gases.
http://www.w3.org/ns/prov#wasQuotedFrom
  • washingtonpost.com