About: http://webisa.webdatacommons.org/309404507

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	The closing of these doors must occur in the absence of building fed power systems, since electrical power may be lost due the fire itself or contributing factors, such as an earthquake, or an explosion, etc.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com