About: http://webisa.webdatacommons.org/20202772

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	In case of fires, earthquakes or other natural disasters, administrators often use a PA system to instruct students and teachers on where to go and how to respond.
http://www.w3.org/ns/prov#wasQuotedFrom	wisegeek.org