[Margaret] brought her grandmother, [Mary], flowers. [Roy] made a romantic dinner for his wife [Mary].
('Roy', 'Margaret')
[Roy] made a romantic dinner for his wife [Mary]. [Margaret] brought her grandmother, [Mary], flowers.
[{('Roy', 'granddaughter', 'Margaret'): [('Roy', 'wife', 'Mary'), ('Mary', 'granddaughter', 'Margaret')]}]