About: http://webisa.webdatacommons.org/244295479

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	A command sent from controller 402 (which may be a computer, processor, logic, or other device, for example) shuts off one of the radiation sources 302, thus allowing the corresponding tag to be read and tested.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com