[Lena] took her daughter, [Pamela], out to dinner. [Frances], [Lena]'s mother, joined them. [Lynn] took her mother, [Frances], out for lunch.
('Lynn', 'Pamela')
[Lynn] took her mother, [Frances], out for lunch. [Lena] took her daughter, [Pamela], out to dinner. [Frances], [Lena]'s mother, joined them.
[{('Lynn', 'niece', 'Pamela'): [('Lynn', 'sister', 'Lena'), ('Lena', 'daughter', 'Pamela')]}, {('Lynn', 'sister', 'Lena'): [('Lynn', 'mother', 'Frances'), ('Frances', 'daughter', 'Lena')]}]
['mother', 'daughter', 'daughter']