[Nicholas] wanted to teach his son [Milton] to play football. So [Nicholas] asked his brother [Dale] to come help teach him.
('Milton', 'Dale')
[Nicholas] wanted to teach his son [Milton] to play football. So [Nicholas] asked his brother [Dale] to come help teach him.
[{('Milton', 'uncle', 'Dale'): [('Milton', 'father', 'Nicholas'), ('Nicholas', 'brother', 'Dale')]}]
['father', 'brother']