[Theresa] spent the afternoon at the movies with her father, [Clarence] and her daughter, [Belva].
('Belva', 'Clarence')
[Theresa] spent the afternoon at the movies with her father, [Clarence] and her daughter, [Belva].
[{('Belva', 'grandfather', 'Clarence'): [('Belva', 'mother', 'Theresa'), ('Theresa', 'father', 'Clarence')]}]
['mother', 'father']