About: http://webisa.webdatacommons.org/56110461

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	Altitudes are given in feet in most of the world, except for China, Russia and a few other places where they use meters.
http://www.w3.org/ns/prov#wasQuotedFrom	airliners.net