[Amy] took her daughter, [Mary], out to dinner. [Ashley], [Amy]'s mother, joined them.
('Ashley', 'Mary')
[Amy] took her daughter, [Mary], out to dinner. [Ashley], [Amy]'s mother, joined them.
[{('Ashley', 'granddaughter', 'Mary'): [('Ashley', 'daughter', 'Amy'), ('Amy', 'daughter', 'Mary')]}]
['daughter', 'daughter']