Assertion: oyster | /r/CapableOf | produce sperm
Facets:
value: at one time
type: TEMPORAL
Source sentences:
text: The eggs are then fertilized by sperm that is also released into the water by the male oysters (or oysters that can produce sperm).
text: At one time, an oyster can only produce either sperm or eggs but they have the ability to switch genders if the situation requires it.