[Dennis] asked his father [Nicholas] if he could borrow some money. [Milton] and his brother [Dennis] wanted to backpack across Europe together once they graduated college.
('Milton', 'Nicholas')
[Milton] and his brother [Dennis] wanted to backpack across Europe together once they graduated college. [Dennis] asked his father [Nicholas] if he could borrow some money.
[{('Milton', 'father', 'Nicholas'): [('Milton', 'brother', 'Dennis'), ('Dennis', 'father', 'Nicholas')]}]
['brother', 'father']