[John] and his uncle [Nicholas] went fishing yesterday. They caught many trout. [George] who is [John]'s father grounded [John] after finding out what [John] had done at school.
('George', 'Nicholas')
[George] who is [John]'s father grounded [John] after finding out what [John] had done at school. [John] and his uncle [Nicholas] went fishing yesterday. They caught many trout.
[{('George', 'brother', 'Nicholas'): [('George', 'son', 'John'), ('John', 'uncle', 'Nicholas')]}]
['son', 'uncle']