Assertion: dolphin | /r/CapableOf | become mature
Facets:
value: sexually
type: MANNER
Source sentences:
text: Most dolphins become sexually mature at between 5 and 8 years old.
text: Hector's dolphins are known to live to least 22 years old, based on photo-based capture-recapture records last updated in 2006, and become sexually mature at around six to eight years of age, after which they produce one calf every two to four years.