<http://webisa.webdatacommons.org/prov/294217333>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/71874934> .
<http://webisa.webdatacommons.org/71874934>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<biomedcentral.com> .
<http://webisa.webdatacommons.org/71874934>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/71874934>	<http://www.w3.org/ns/prov#value>	"variables, such as level of poverty or education in the community." .