Assertion: female opossum | /r/HasAspect | a litter of babies
Facets:
value: each year
type: TEMPORAL
Source sentences:
text: A female opossum will line the nest with grass and leaves when she is about to give birth or already has a litter of babies.
text: Female opossums can have up to three litters of babies each year with an average of 9 babies per litter.