Assertion: puffin | /r/CapableOf | become mature
Facets:
value: at the age
type: TEMPORAL
Source sentences:
text: The life cycle of puffins starts when they become mature at the age of 3 to 5 years.
text: Puffins become mature at the age 4-5 then they return home to their fledging grounds to steal a burrow or they dig a new hole if all the old ones are occupied.