[George] took his son [John] for boxing lessons. He felt the boy needed to toughen up. [Theresa] does n't like having to babysit her younger brother, [George].
('Theresa', 'John')
[Theresa] does n't like having to babysit her younger brother, [George]. [George] took his son [John] for boxing lessons. He felt the boy needed to toughen up.
[{('Theresa', 'nephew', 'John'): [('Theresa', 'brother', 'George'), ('George', 'son', 'John')]}]
['brother', 'son']