About: http://webisa.webdatacommons.org/426113549

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 sensors or other detection units transfer corresponding data to the signaling unit, which then converts the data into corresponding signals, which correspond to the closed states.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk