Assertion: inventor | /r/CapableOf | invent rotary fan
Facets:
value: with seven wheels
type: OTHER
value: for air conditioning
type: PURPOSE
Source sentences:
text: The 2nd-century Chinese mechanical engineer and inventor Ding Huan of the Han Dynasty invented a rotary fan for air conditioning, with seven wheels 3 m (10 ft) in diameter and manually powered by prisoners.