About: http://webisa.webdatacommons.org/438043105

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	All electric circuits must have a voltage source, such as a battery, and a conductor, which is usually wire.
http://www.w3.org/ns/prov#wasQuotedFrom	ck12.org