[Lillian] and her brother [Wayne] went to the movies together. [Amy] and her sister [Lillian] played golf together. [Amy] won easily.
('Wayne', 'Amy')
[Lillian] and her brother [Wayne] went to the movies together. [Amy] and her sister [Lillian] played golf together. [Amy] won easily.
[{('Wayne', 'sister', 'Amy'): [('Wayne', 'sister', 'Lillian'), ('Lillian', 'sister', 'Amy')]}]
['sister', 'sister']