[Louis] went to the park with his father, [Harold]. [Bobby]'s father, [Antonio], recently had a falling out with each other. [Robert] had always been close to his brother [Antonio]. On the other hand, [Robert] and his brother [Louis] had n't spoken in years.
('Bobby', 'Harold')
[Bobby]'s father, [Antonio], recently had a falling out with each other. [Robert] had always been close to his brother [Antonio]. On the other hand, [Robert] and his brother [Louis] had n't spoken in years. [Louis] went to the park with his father, [Harold].
[{('Bobby', 'grandfather', 'Harold'): [('Bobby', 'father', 'Antonio'), ('Antonio', 'father', 'Harold')]}, {('Antonio', 'father', 'Harold'): [('Antonio', 'brother', 'Louis'), ('Louis', 'father', 'Harold')]}, {('Antonio', 'brother', 'Louis'): [('Antonio', 'brother', 'Robert'), ('Robert', 'brother', 'Louis')]}]
['father', 'brother', 'brother', 'father']