<http://webisa.webdatacommons.org/prov/472708585>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/311863893> .
<http://webisa.webdatacommons.org/311863893>	<http://www.w3.org/ns/prov#value>	"Categories such as Machines and Transportation, Geography/History, and Society and Government limit returns for younger students, but offer ample resources for projects and background materials." .
<http://webisa.webdatacommons.org/311863893>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<teachinghistory.org> .
<http://webisa.webdatacommons.org/prov/51592067>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/311863893> .
<http://webisa.webdatacommons.org/311863893>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .