[John] helped his brother, [Ernest], study for the chemistry exam. [Ernest] took his son [Timmy] for boxing lessons. He felt the boy needed to toughen up.
('John', 'Timmy')
[John] helped his brother, [Ernest], study for the chemistry exam. [Ernest] took his son [Timmy] for boxing lessons. He felt the boy needed to toughen up.
[{('John', 'nephew', 'Timmy'): [('John', 'brother', 'Ernest'), ('Ernest', 'son', 'Timmy')]}]