[George] took his daughter [Andrea] to school this morning and then stopped by to visit his father [Clarence].
('Andrea', 'Clarence')
[George] took his daughter [Andrea] to school this morning and then stopped by to visit his father [Clarence].
[{('Andrea', 'grandfather', 'Clarence'): [('Andrea', 'father', 'George'), ('George', 'father', 'Clarence')]}]
['father', 'father']