create alias double_pregnant (0) -> taur_double_pregnancy (53)
create alias double_pregnancy (0) -> taur_double_pregnancy (53)
create implication taur_double_pregnancy (53) -> taur_upper_pregnancy (62)
create implication taur_double_pregnancy (53) -> taur_lower_pregnancy (202)
create alias impregnation_while_pregnant (9) -> stacked_impregnation (32)