[Mary] and her husband [Roy] went to dinner. [Roy]'s granddaughter [Alberta] went with them.
('Mary', 'Alberta')
[Mary] and her husband [Roy] went to dinner. [Roy]'s granddaughter [Alberta] went with them.
[{('Mary', 'granddaughter', 'Alberta'): [('Mary', 'husband', 'Roy'), ('Roy', 'granddaughter', 'Alberta')]}]