Scope note: This property links an E67Birth event to an E21 Person in the role of offspring. Twins, triplets etc. are brought into life by the same Birth event. 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. Examples: - the Birth of Queen Elizabeth II (E67) brought into life Queen Elizabeth II (E21) In First Order Logic: P98(x,y) ⊃ E67(x) P98(x,y) ⊃ E21(y) P98(x,y) ⊃ P92(x,y)