[Dennis] asked his mother [Amy] to read to him. [Amy] was too busy. [Amy] treasures her son, [Milton]. She recently attended his high school graduation and it was the proudest day of her life.
('Dennis', 'Milton')
[Dennis] asked his mother [Amy] to read to him. [Amy] was too busy. [Amy] treasures her son, [Milton]. She recently attended his high school graduation and it was the proudest day of her life.
[{('Dennis', 'brother', 'Milton'): [('Dennis', 'mother', 'Amy'), ('Amy', 'son', 'Milton')]}]
['mother', 'son']