Assertion: oyster's shell | /r/HasAspect | sharper ridges
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: The shell of the Pacific oyster is more deeply cupped, rougher and more elongated than that of the native, while the shell of the Portuguese oyster usually has even sharper ridges, but Pacific and Portuguese oysters are not always readily distinguishable from each other.