Assertion: kangaroo's joey | /r/CapableOf | become independent
Facets:
value: at about 18 months of age
type: TEMPORAL
Source sentences:
text: Because of this very efficient way of bringing up their young, kangaroos raise on average three young every two years, even though it takes such a long time for the joey to become independent.
text: A joey becomes independent at about 18 months of age.