[Theresa] took her son [Tony] to the park. [Theresa] was talking about food with her sister [Lillian].
('Tony', 'Lillian')
[Theresa] took her son [Tony] to the park. [Theresa] was talking about food with her sister [Lillian].
[{('Tony', 'aunt', 'Lillian'): [('Tony', 'mother', 'Theresa'), ('Theresa', 'sister', 'Lillian')]}]
['mother', 'sister']