[Nicolas]'s mother, [Theresa], was worried about him. He had n't been eating. [Clarence] took his daughter [Theresa] to softball practie.
('Nicolas', 'Clarence')
[Nicolas]'s mother, [Theresa], was worried about him. He had n't been eating. [Clarence] took his daughter [Theresa] to softball practie.
[{('Nicolas', 'grandfather', 'Clarence'): [('Nicolas', 'mother', 'Theresa'), ('Theresa', 'father', 'Clarence')]}]
['mother', 'father']