[Wayne] and his sister [Lillian] were fighting. [Robert] asked his father if they would ever make up.
('Robert', 'Lillian')
[Wayne] and his sister [Lillian] were fighting. [Robert] asked his father if they would ever make up.
[{('Robert', 'aunt', 'Lillian'): [('Robert', 'father', 'Wayne'), ('Wayne', 'sister', 'Lillian')]}]
['father', 'sister']