[John] spent the day with his aunt, [Nancy]. They had a wonderful time doing all sorts of things. [John] went to the park with his father, [George].
('George', 'Nancy')
[John] went to the park with his father, [George]. [John] spent the day with his aunt, [Nancy]. They had a wonderful time doing all sorts of things.
[{('George', 'sister', 'Nancy'): [('George', 'son', 'John'), ('John', 'aunt', 'Nancy')]}]
['son', 'aunt']