Assertion: sparrow's wing | /r/CapableOf | overlap with other secondaries
Facets:
value: to form an airfoil
type: PURPOSE
Source sentences:
text: While secondariessecondaryone of the feathers occupying the inner half of the wing that overlap with other secondaries to form an airfoil that provides lift during flight cannot be controlled as extensively, they provide most of the lift by overlapping to form an efficient airfoilairfoilwinglike structure that produces lift and drag as it moves through the air.