[Mary] received a wonderful hand-written letter from her grandson [Thomas]. [Thomas]'s sister, [Gladys], was too lazy to send one though.
('Gladys', 'Mary')
[Mary] received a wonderful hand-written letter from her grandson [Thomas]. [Thomas]'s sister, [Gladys], was too lazy to send one though.
[{('Gladys', 'grandmother', 'Mary'): [('Gladys', 'brother', 'Thomas'), ('Thomas', 'grandmother', 'Mary')]}]