<http://webisa.webdatacommons.org/prov/504380829>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/226535761> .
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<http://webisa.webdatacommons.org/226535761>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<biomedsearch.com> .
<http://webisa.webdatacommons.org/226535761>	<http://www.w3.org/ns/prov#value>	"Lindh Ingela - - 2010 BACKGROUND: There is a need to improve our understanding of contraceptive use over the long term." .