<http://webisa.webdatacommons.org/313031452>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/425551134>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/313031452> .
<http://webisa.webdatacommons.org/313031452>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<edn.com> .
<http://webisa.webdatacommons.org/313031452>	<http://www.w3.org/ns/prov#value>	"They are relatively obscure devices for average engineers, partially because they can require significant skill to produce something other than a screen full of disconnected dots." .