[Robert] went to the park with his father, [John]. [Robert] has an aunt named [Stephanie].
('John', 'Stephanie')
[Robert] went to the park with his father, [John]. [Robert] has an aunt named [Stephanie].
[{('John', 'sister', 'Stephanie'): [('John', 'son', 'Robert'), ('Robert', 'aunt', 'Stephanie')]}]