<http://webisa.webdatacommons.org/30355466>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<openstudy.com> .
<http://webisa.webdatacommons.org/30355466>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/131401727>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/30355466> .
<http://webisa.webdatacommons.org/30355466>	<http://www.w3.org/ns/prov#value>	"for #6, C is a point, not an angle" .