[Amy] went out to dinner with her sister [Lillian], and [Lillian]'s daughter [Andrea].
('Amy', 'Andrea')
[Amy] went out to dinner with her sister [Lillian], and [Lillian]'s daughter [Andrea].
[{('Amy', 'niece', 'Andrea'): [('Amy', 'sister', 'Lillian'), ('Lillian', 'daughter', 'Andrea')]}]
['sister', 'daughter']