<http://webisa.webdatacommons.org/prov/476434190>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/435213306> .
<http://webisa.webdatacommons.org/435213306>	<http://www.w3.org/ns/prov#value>	"Topics such as multiple ground systems, connections to ground, potential difference, circulating curren" .
<http://webisa.webdatacommons.org/435213306>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/435213306>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<docstoc.com> .