About: http://webisa.webdatacommons.org/121385170

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	Previously, security systems protected a building using make/break contacts strategically placed at doors, windows, and other potential entry points.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca