The other day, [Margaret] went shopping with her grandmother, [Mary]. While she was out, her father, [John], passed away.
('John', 'Mary')
The other day, [Margaret] went shopping with her grandmother, [Mary]. While she was out, her father, [John], passed away.
[{('John', 'mother', 'Mary'): [('John', 'daughter', 'Margaret'), ('Margaret', 'grandmother', 'Mary')]}]