[Alberta] is [Mary]'s Grandaughter, and [Mary] is married to someone named [Roy].
('Roy', 'Alberta')
[Alberta] is [Mary]'s Grandaughter, and [Mary] is married to someone named [Roy].
[{('Roy', 'granddaughter', 'Alberta'): [('Roy', 'wife', 'Mary'), ('Mary', 'granddaughter', 'Alberta')]}]