PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Although rarely, headaches can be signs of more serious illness such as meningitis, cerebral hemorrhaging or a brain tumor, according to emergency doctors [source: American College of Emergency Physicians Foundation].The thing with headaches is they can coincide with patients feeling sick to their stomachs and vomiting, which can cause them to suspect having a more serious condition.
http://www.w3.org/ns/prov#wasQuotedFrom
  • howstuffworks.com