[Theresa] took her younger sister [Lillian] to the carnival last weekend. [Janet] was celebrating her birthday with her mother [Lillian].
('Janet', 'Theresa')
[Janet] was celebrating her birthday with her mother [Lillian]. [Theresa] took her younger sister [Lillian] to the carnival last weekend.
[{('Janet', 'aunt', 'Theresa'): [('Janet', 'mother', 'Lillian'), ('Lillian', 'sister', 'Theresa')]}]
['mother', 'sister']