<http://webisa.webdatacommons.org/196209691>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/440351038>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/196209691> .
<http://webisa.webdatacommons.org/196209691>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<maxwelldemon.com> .
<http://webisa.webdatacommons.org/196209691>	<http://www.w3.org/ns/prov#value>	"The crossing number is a classic example of this as it is a 2d not a 3d property." .