Assertion: oyster's valve | /r/HasProperty | mirror images of one other
Facets:
value: in most cases
type: TEMPORAL
Source sentences:
text: In brachiopods, the two valves are positioned on the dorsal and ventral surfaces of the body, while in bivalves, the valves are on the left and right sides of the body, and are, in most cases, mirror images of one other.