About: http://webisa.webdatacommons.org/300934084

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	Aircraft periodically report the exact time they pass over various navigation aids so that the ATC can monitor the progress of the aircraft relative to its flight plan and other aircraft.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com