Assertion: turbine's blade | /r/CapableOf | produce 1-10 kw of electricity
Facets:
value: at their optimal wind speed
type: MANNER
Source sentences:
text: Their blades are usually 1.5 to 3.5 metres (4 ft 11 in–11 ft 6 in) in diameter and produce 1-10 kW of electricity at their optimal wind speed.