[Louis] called his brother [Pedro] and invited him to his son [Michael]'s football game. [Robert] played catch with his dad, [Harold] [Pedro] asked his father [Harold] if he could borrow some money.
('Michael', 'Robert')
[Louis] called his brother [Pedro] and invited him to his son [Michael]'s football game. [Pedro] asked his father [Harold] if he could borrow some money. [Robert] played catch with his dad, [Harold]
[{('Michael', 'uncle', 'Robert'): [('Michael', 'father', 'Louis'), ('Louis', 'brother', 'Robert')]}, {('Louis', 'brother', 'Robert'): [('Louis', 'father', 'Harold'), ('Harold', 'son', 'Robert')]}, {('Louis', 'father', 'Harold'): [('Louis', 'brother', 'Pedro'), ('Pedro', 'father', 'Harold')]}]
['father', 'brother', 'father', 'son']