[Lillian] took her sister [Nancy] out for dinner to celebrate her birthday. [Lillian]'s daughter, [Andrea], just graduated high school.
('Nancy', 'Andrea')
[Lillian] took her sister [Nancy] out for dinner to celebrate her birthday. [Lillian]'s daughter, [Andrea], just graduated high school.
[{('Nancy', 'niece', 'Andrea'): [('Nancy', 'sister', 'Lillian'), ('Lillian', 'daughter', 'Andrea')]}]
['sister', 'daughter']