create implication identical_twins (334) -> twins (0)
create implication fraternal_twins (587) -> twins (0)
create implication twin_sisters (27) -> twins (0)
create implication twin_sisters (27) -> sibling (0)
create implication twin_sisters (27) -> sisters (0)
create implication twin_sisters (27) -> sister (0)
create implication twin_brothers (45) -> twins (0)
create implication twin_brothers (45) -> sibling (0)
create implication twin_brothers (45) -> brothers (0)
create implication twin_brothers (45) -> brother (0)