About: http://webisa.webdatacommons.org/221540236

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	However, many couples use unreliable methods of birth control, such as periodic abstinence or withdrawal, even though many types of modern contraceptives are now available.
http://www.w3.org/ns/prov#wasQuotedFrom	dktinternational.org