PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Why is the solar emission spectra nearly continuous, when the sun itself is mostly made up of hydrogen and helium which themselves have very discrete spectra?
http://www.w3.org/ns/prov#wasQuotedFrom
  • nasa.gov