[Bernardo] could n't wait to introduce his new son to his uncle, [Louis]. [Robert]'s son is [John]. [John] and his father always go fishing together on Sundays and have a great time together. [Antonio] took his son [Bernardo] for boxing lessons. He felt the boy needed to toughen up. [Louis] helped his brother, [Robert], study for the chemistry exam.
('Antonio', 'John')
[Antonio] took his son [Bernardo] for boxing lessons. He felt the boy needed to toughen up. [Bernardo] could n't wait to introduce his new son to his uncle, [Louis]. [Louis] helped his brother, [Robert], study for the chemistry exam. [Robert]'s son is [John]. [John] and his father always go fishing together on Sundays and have a great time together.
[{('Antonio', 'nephew', 'John'): [('Antonio', 'brother', 'Robert'), ('Robert', 'son', 'John')]}, {('Antonio', 'brother', 'Robert'): [('Antonio', 'brother', 'Louis'), ('Louis', 'brother', 'Robert')]}, {('Antonio', 'brother', 'Louis'): [('Antonio', 'son', 'Bernardo'), ('Bernardo', 'uncle', 'Louis')]}]
['son', 'uncle', 'brother', 'son']