[George] does not know he has a son named [John]. [John] invited his Aunt [Theresa] to come to his graduation party.
('George', 'Theresa')
[George] does not know he has a son named [John]. [John] invited his Aunt [Theresa] to come to his graduation party.
[{('George', 'sister', 'Theresa'): [('George', 'son', 'John'), ('John', 'aunt', 'Theresa')]}]
['son', 'aunt']