[Janet] and her mother [Lillian] visited her grandfather [Clarence]
('Lillian', 'Clarence')
[Janet] and her mother [Lillian] visited her grandfather [Clarence]
[{('Lillian', 'father', 'Clarence'): [('Lillian', 'daughter', 'Janet'), ('Janet', 'grandfather', 'Clarence')]}]
['daughter', 'grandfather']