About: http://webisa.webdatacommons.org/127516402

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 assuming, as others have said, it is a combination of many things, including the fact they want to get the original models going first.
http://www.w3.org/ns/prov#wasQuotedFrom	airliners.net