Assertion: drum's shell | /r/HasAspect | circular opening
Facets:
value: almost invariably
type: TEMPORAL
value: almost always
type: TEMPORAL
Source sentences:
text: The shell almost always has a circular opening over which the drumhead is stretched, but the shape of the remainder of the shell varies widely.
text: The shell almost invariably has a circular opening over which the drumhead is stretched, but the shape of the remainder of the shell varies widely.