About: http://webisa.webdatacommons.org/182942774

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 use the system to warn the public about tornadoes, floods, missing children or other emergencies.
http://www.w3.org/ns/prov#wasQuotedFrom	nationaljournal.com