About: http://webisa.webdatacommons.org/63464185

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	elements for convenience in operation and maintenance. The arc may be prevented from moving laterally off the edge of the evaporable surface by known means, e.g. insulators, shields, conductive rings, or permeable rings.
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com