[Lillian]'s daughter, [Ann], just graduated high school. [Janet] took her mother, [Lillian], out for lunch.
('Janet', 'Ann')
[Janet] took her mother, [Lillian], out for lunch. [Lillian]'s daughter, [Ann], just graduated high school.
[{('Janet', 'sister', 'Ann'): [('Janet', 'mother', 'Lillian'), ('Lillian', 'daughter', 'Ann')]}]
['mother', 'daughter']