[Lillian] took her son [Jerry] to the football game. [Theresa] and her nephew [Jerry] played the piano together.
('Lillian', 'Theresa')
[Lillian] took her son [Jerry] to the football game. [Theresa] and her nephew [Jerry] played the piano together.
[{('Lillian', 'sister', 'Theresa'): [('Lillian', 'son', 'Jerry'), ('Jerry', 'aunt', 'Theresa')]}]
['son', 'aunt']