[Timmy] asked his grandmother [Mary] for milk. [Mary]'s husband [Roy] went to the store for milk.
('Roy', 'Timmy')
[Timmy] asked his grandmother [Mary] for milk. [Mary]'s husband [Roy] went to the store for milk.
[{('Roy', 'grandson', 'Timmy'): [('Roy', 'wife', 'Mary'), ('Mary', 'grandson', 'Timmy')]}]