PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Proton beam therapy is a form of external beam radiation treatment that uses protons rather than photon X-rays to treat certain types of cancer and other diseases.
http://www.w3.org/ns/prov#wasQuotedFrom
  • sciencedaily.com