[John] is a man with a son named [George]. [Theresa] is taking her nephew [John] to the park.
('George', 'Theresa')
[John] is a man with a son named [George]. [Theresa] is taking her nephew [John] to the park.
[{('George', 'sister', 'Theresa'): [('George', 'son', 'John'), ('John', 'aunt', 'Theresa')]}]
['son', 'aunt']