[Stephanie] was honored to take her son [William] to the mother son dance at her son's school last Friday. [Mary] took her daughter, [Stephanie], to lunch.
('William', 'Mary')
[Stephanie] was honored to take her son [William] to the mother son dance at her son's school last Friday. [Mary] took her daughter, [Stephanie], to lunch.
[{('William', 'grandmother', 'Mary'): [('William', 'mother', 'Stephanie'), ('Stephanie', 'mother', 'Mary')]}]