Assertion: puberty's age | /r/HasProperty | reckoned an average of two weeks
Facets:
value: usually
type: TEMPORAL
value: as a rule
type: OTHER
Source sentences:
text: (Age in the fetal period is usually reckoned from the first day of the last menstrual period, an average of two weeks before actual fertilization, but, as a rule, the only locatable landmark.)