Assertion: hot air balloon | /r/HasProperty | pioneered
Facets:
value: by ed yost
type: OTHER
value: beginning in the 1950s
type: TEMPORAL
Source sentences:
text: Modern hot air balloons, with a more sophisticated onboard heat source than the Montgolfier brothers' basket of hot coals, were pioneered beginning in the 1950s by Ed Yost, who had his first successful flight on October 22, 1960.