Assertion: male narwhal | /r/CapableOf | attain sexual maturity
Facets:
Source sentences:
text: Male narwhals attain sexual maturity at 11 to 13 years of age, when they are about 3.9 m (12.8 ft) long.
text: Male narwhals attain sexual maturity at 11 to 13 years of age, when they are about 3.9 m (12.8 ft) long.
text: Male narwhals attain sexual maturity at 11 to 13 years of age, when they are about 3.9Â m (12.8Â ft) long.