Assertion: balloon's flight | /r/CapableOf | use propane-based heating system
Facets:
value: in nebraska
type: LOCATION
value: on october 22nd of 1960
type: TEMPORAL
Source sentences:
text: This type of balloon was only invented in the 1960s by Ed Yost, who launched the first flight using the propane-based heating system on October 22nd of 1960 in Nebraska, USA.