About: http://webisa.webdatacommons.org/58209430

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	finally designed, naturally air fights took place at the new heights and pilots began to have new kinds of malfunctions that were traced to the extreme cold at these altitudes.
http://www.w3.org/ns/prov#wasQuotedFrom	ibiblio.org