About: http://webisa.webdatacommons.org/275752789

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	I am to understand that spotters exist that do not even photo document the aircraft, they just record the movements of them with a monoscope, scanners and all kinds of stuff.
http://www.w3.org/ns/prov#wasQuotedFrom	airliners.net