Assertion: bird's forelimb | /r/CapableOf | retain webbing
Facets:
value: between the digits
type: LOCATION
value: into the wing membranes
type: TRANSITIVE-OBJECT
Source sentences:
text: For bat embryos, apoptosis (cell death) affects only the hindlimbs, while the forelimbs retain webbing between the digits that forms into the wing membranes.