<http://webisa.webdatacommons.org/263436710>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/430313179>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/263436710> .
<http://webisa.webdatacommons.org/263436710>	<http://www.w3.org/ns/prov#value>	"A cylinder, for example, is a ruled surface of parallel straight lines." .
<http://webisa.webdatacommons.org/263436710>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<daviddarling.info> .