[Amy] talks to her son [Milton] every day. [Dennis]'s mother, [Amy], was calling him for dinner.
('Dennis', 'Milton')
[Dennis]'s mother, [Amy], was calling him for dinner. [Amy] talks to her son [Milton] every day.
[{('Dennis', 'brother', 'Milton'): [('Dennis', 'mother', 'Amy'), ('Amy', 'son', 'Milton')]}]
['mother', 'son']