PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • In young men, erection problems are commonly caused by psychological factors, such as stress or negative thoughts or feelings about sex.
http://www.w3.org/ns/prov#wasQuotedFrom
  • baymedical.org