create alias double_pregnant (0) -> taur_double_pregnancy (64)
create alias double_pregnancy (0) -> taur_double_pregnancy (64)
create implication taur_double_pregnancy (64) -> taur_upper_pregnancy (80)
create implication taur_double_pregnancy (64) -> taur_lower_pregnancy (265)
create alias impregnation_while_pregnant (15) -> stacked_impregnation (39)