[Nicholas] did n't get along very well with his sister [Nancy] for some reason. [Mary] was shopping for a new jacket with her father [Nicholas].
('Mary', 'Nancy')
[Mary] was shopping for a new jacket with her father [Nicholas]. [Nicholas] did n't get along very well with his sister [Nancy] for some reason.
[{('Mary', 'aunt', 'Nancy'): [('Mary', 'father', 'Nicholas'), ('Nicholas', 'sister', 'Nancy')]}]
['father', 'sister']