<http://webisa.webdatacommons.org/prov/499137956>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/71629750> .
<http://webisa.webdatacommons.org/71629750>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<biomedcentral.com> .
<http://webisa.webdatacommons.org/71629750>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/71629750>	<http://www.w3.org/ns/prov#value>	"sub-fertility remains unclear and for this reason, there is an urgent need for prospective" .