PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Oral, injected or implanted hormonal contraceptive, barrier methods (condom or diaphragm with spermicide); intrauterine device or sexual abstinence was considered acceptable forms of birth control.
http://www.w3.org/ns/prov#wasQuotedFrom
  • clinicaltrials.gov