This property links an instance of E67 Birth to an instance of E21 Person in the role of birth-giving mother.
Note that biological fathers are not necessarily participants in the Birth (see P97from father (was father for)). The instance of P21 Person being born is linked to the instance of E67 Birth with the property P98brought into life (was born). This is not intended for use with general natural history material, only people. There is no explicit method for modelling conception and gestation except by using extensions.
The birth of Queen Elizabeth II (E67) by mother Her Majesty Queen Elizabeth The Queen Mother (E21). (Parker, 2002)