[Roy] woke up and said hello to his wife, [Mary]. [Mary] wrote a nice letter to her grandson [Fernando].
('Roy', 'Fernando')
[Roy] woke up and said hello to his wife, [Mary]. [Mary] wrote a nice letter to her grandson [Fernando].
[{('Roy', 'grandson', 'Fernando'): [('Roy', 'wife', 'Mary'), ('Mary', 'grandson', 'Fernando')]}]