Assertion: female sea otter | /r/CapableOf | become mature
Facets:
value: at four years
type: TEMPORAL
value: sexually
type: MANNER
Source sentences:
text: Female sea otters become sexually mature at about 3 or 4 years of age; males do so at 5 or 6 although most males don't establish a territory until they are 7 or 8.
text: Female sea otters become sexually mature at four years, while the males take a month more; however, breeding takes place much later.
text: Female sea otters become mature at about four years.