[Lillian] drove her son [John] to his soccer game. [John] loves visiting his aunt [Nancy] over the weekends.
('Lillian', 'Nancy')
[Lillian] drove her son [John] to his soccer game. [John] loves visiting his aunt [Nancy] over the weekends.
[{('Lillian', 'sister', 'Nancy'): [('Lillian', 'son', 'John'), ('John', 'aunt', 'Nancy')]}]
['son', 'aunt']