About: http://webisa.webdatacommons.org/319306858

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	Further, the conductive layers of the printed circuit board may also include one or more power planes and/or ground planes, which are typically sheets of conductive material, such as copper.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com