PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • In 1959 Philip Morrison and Giuseppe Cocconi, two physicists at Cornell University, argued that because hydrogen is the most common substance in the universe and naturally emits radio waves in a relatively noise-free portion of the radio spectrum, it would be logical to listen there for a signal from intelligent beings.
http://www.w3.org/ns/prov#wasQuotedFrom
  • mee.nu