About: http://webisa.webdatacommons.org/176807311

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 the event of reported malfunction, this check is a quick means of telling if at least the system has a station responding.
http://www.w3.org/ns/prov#wasQuotedFrom	aviationpros.com