Last night, [Lillian] went out with her sister [Nancy], accompanied by [Lillian]'s daughter [Ann].
('Nancy', 'Ann')
Last night, [Lillian] went out with her sister [Nancy], accompanied by [Lillian]'s daughter [Ann].
[{('Nancy', 'niece', 'Ann'): [('Nancy', 'sister', 'Lillian'), ('Lillian', 'daughter', 'Ann')]}]
['sister', 'daughter']