[Milton]'s mother, [Amy], was calling him for dinner. [Amy] took her mother, [Ashley], out for lunch.
('Milton', 'Ashley')
[Milton]'s mother, [Amy], was calling him for dinner. [Amy] took her mother, [Ashley], out for lunch.
[{('Milton', 'grandmother', 'Ashley'): [('Milton', 'mother', 'Amy'), ('Amy', 'mother', 'Ashley')]}]
['mother', 'mother']