[John]'s mom, [Lillian], took him and her daughter, [Ann], out for lunch,
('John', 'Ann')
[John]'s mom, [Lillian], took him and her daughter, [Ann], out for lunch,
[{('John', 'sister', 'Ann'): [('John', 'mother', 'Lillian'), ('Lillian', 'daughter', 'Ann')]}]
['mother', 'daughter']