Assertion: frontal sinus | /r/CapableOf | reach full size
Facets:
value: after puberty
type: TEMPORAL
value: after 20 years
type: TEMPORAL
Source sentences:
text: The frontal sinuses develop as a person ages, reaching full size after 20 years.
text: The frontal sinuses are absent at birth, but are generally fairly well developed between the seventh and eighth years, only reaching their full size after puberty.