<http://webisa.webdatacommons.org/prov/20798167>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/255763015> .
<http://webisa.webdatacommons.org/255763015>	<http://www.w3.org/ns/prov#value>	"course, one of the significant differences between the" .
<http://webisa.webdatacommons.org/255763015>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<nrc.gov> .
<http://webisa.webdatacommons.org/255763015>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .