About: http://webisa.webdatacommons.org/127516599

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	as a response to incidents such as Columbine, Sandy Hook and Isla Vista, but, Bliss says, such drills have been held for the past ten years.
http://www.w3.org/ns/prov#wasQuotedFrom	tricityvoice.com