[Lillian] was eating dinner with her sister [Theresa]. [Lillian]'s brother [Wayne] was n't invited.
('Theresa', 'Wayne')
[Lillian] was eating dinner with her sister [Theresa]. [Lillian]'s brother [Wayne] was n't invited.
[{('Theresa', 'brother', 'Wayne'): [('Theresa', 'sister', 'Lillian'), ('Lillian', 'brother', 'Wayne')]}]
['sister', 'brother']