create alias double_pregnant (0) -> taur_double_pregnancy (49)
create alias double_pregnancy (0) -> taur_double_pregnancy (49)
create implication taur_double_pregnancy (49) -> taur_upper_pregnancy (57)
create implication taur_double_pregnancy (49) -> taur_lower_pregnancy (194)
create alias impregnation_while_pregnant (2) -> stacked_impregnation (32)