<http://webisa.webdatacommons.org/6937947>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/6937947>	<http://www.w3.org/ns/prov#value>	"sampling or other methods to address selection bias also calls some" .
<http://webisa.webdatacommons.org/6937947>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<purdue.edu> .
<http://webisa.webdatacommons.org/prov/485470228>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/6937947> .