[Milton] went to the park with his father, [Nicholas]. [Nicholas] and his brother [Dale] are constantly trying to one up each other.
('Milton', 'Dale')
[Milton] went to the park with his father, [Nicholas]. [Nicholas] and his brother [Dale] are constantly trying to one up each other.
[{('Milton', 'uncle', 'Dale'): [('Milton', 'father', 'Nicholas'), ('Nicholas', 'brother', 'Dale')]}]
['father', 'brother']