Assertion: bald eagle | /r/CapableOf | reach adult plumage
Facets:
value: gradually
type: MANNER
value: at the age of five years
type: TEMPORAL
Source sentences:
text: During the next four years, the bald eagle continuously undergoes plumage change until it reaches adult plumage at the age of five years.
text: They gradually acquire the adult plumage as they mature, which takes about five years.