About: http://webisa.webdatacommons.org/60776770

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 plane is an enclosed space - so the birds weight would be the same whether they were flying or perched - the same goes for the flapping of wings - no effect at all on the plane.
http://www.w3.org/ns/prov#wasQuotedFrom	digitalspy.co.uk