[Kevin]'s mother, [Nancy], is glad that her father, [Clarence] is a part of her life.
('Kevin', 'Clarence')
[Kevin]'s mother, [Nancy], is glad that her father, [Clarence] is a part of her life.
[{('Kevin', 'grandfather', 'Clarence'): [('Kevin', 'mother', 'Nancy'), ('Nancy', 'father', 'Clarence')]}]
['mother', 'father']