[Mary] took her daughter [Stephanie] to the theme park. [Mary]'s son, [John], did n't want to on roller coasters.
('John', 'Stephanie')
[Mary] took her daughter [Stephanie] to the theme park. [Mary]'s son, [John], did n't want to on roller coasters.
[{('John', 'sister', 'Stephanie'): [('John', 'mother', 'Mary'), ('Mary', 'daughter', 'Stephanie')]}]