Assertion: gully | /r/HasAspect | dendritic alcove
Facets:
value: at its head
type: LOCATION
value: usually
type: TEMPORAL
Source sentences:
text: Usually, each gully has a dendritic alcove at its head, a fan-shaped apron at its base, and a single thread of incised channel linking the two, giving the whole gully an hourglass shape.