[Roy] and his wife [Mary] were going to pick up [Mary]'s daughter [Stephanie].
('Roy', 'Stephanie')
[Roy] and his wife [Mary] were going to pick up [Mary]'s daughter [Stephanie].
[{('Roy', 'daughter', 'Stephanie'): [('Roy', 'wife', 'Mary'), ('Mary', 'daughter', 'Stephanie')]}]