About: http://webisa.webdatacommons.org/271839935

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	Authorities have been working to improve a nationwide system of air-raid sirens, shelters and other emergency services.
http://www.w3.org/ns/prov#wasQuotedFrom	seattletimes.com