About: http://webisa.webdatacommons.org/207779991

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	Typically, the alarm sensor 13 is an optical sensor, such as a photoelectric cell, which detects the ingress of light into the enclosure space when the portion of the enclosure 11 is moved from the closed condition to the open condition.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com