Assertion: spacecraft's flight | /r/CapableOf | reach altitude
Facets:
value: between 80–100 km
type: OTHER
Source sentences:
text: United States single seat, air-launched spaceplane; two X-15 flights above the 100 km Kármán line occurred in 1963, an additional 11 flights between 1962 and 1968 reached altitudes between 80–100 km which were recognised as spaceflights by US authorities.