[Mary] offered to take her grandson [Timmy] to the park but [Timmy] wanted to stay home and play cards with his sister [Gladys] instead.
('Gladys', 'Mary')
[Mary] offered to take her grandson [Timmy] to the park but [Timmy] wanted to stay home and play cards with his sister [Gladys] instead.
[{('Gladys', 'grandmother', 'Mary'): [('Gladys', 'brother', 'Timmy'), ('Timmy', 'grandmother', 'Mary')]}]