<http://webisa.webdatacommons.org/157593283>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<mathforum.org> .
<http://webisa.webdatacommons.org/157593283>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/157593283>	<http://www.w3.org/ns/prov#value>	"Each Web chapter provides a set of simulations, demonstrations, and other activities to supplement Elementary" .
<http://webisa.webdatacommons.org/prov/63924184>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/157593283> .