About: http://webisa.webdatacommons.org/309426486

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	That is why the 'Zero-G' Airbus A300 that ESA uses for parabolic flights has to 'freefall' through the air - with no force other than gravity acting on it - to generate 20 seconds of weightlessness at a time.
http://www.w3.org/ns/prov#wasQuotedFrom	esa.int