[Glen] and his brother [Milton] are constantly trying to one up each other. [Amy]'s biggest accomplishment is raising her son [Glen].
('Amy', 'Milton')
[Amy]'s biggest accomplishment is raising her son [Glen]. [Glen] and his brother [Milton] are constantly trying to one up each other.
[{('Amy', 'son', 'Milton'): [('Amy', 'son', 'Glen'), ('Glen', 'brother', 'Milton')]}]
['son', 'brother']