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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	the differences than the hardware or environment. the article is mostly behind a subscription, so here is a relevant extract vie Flight Safety Information provided by Curt Lewis & Associates news
http://www.w3.org/ns/prov#wasQuotedFrom	abovetopsecret.com