Assertion: boomerang's performance | /r/CapableOf | fall above altitudes of 15,000 ft
Facets:
value: rapidly
type: MANNER
Source sentences:
text: While the CA-12 was lively at low level, its performance fell away rapidly above altitudes of 15,000 ft (4,600 m), and its maximum speed of 265 knots (490 km/h) was not sufficient to make it an effective counter to Japanese fighters like the Zero and the Japanese Army's Nakajima Ki 43 ("Oscar").