[James] took his Mom, [Theresa], to the clothing store. [Theresa] wanted to buy her Dad, [Clarence], a new jacket.
('James', 'Clarence')
[James] took his Mom, [Theresa], to the clothing store. [Theresa] wanted to buy her Dad, [Clarence], a new jacket.
[{('James', 'grandfather', 'Clarence'): [('James', 'mother', 'Theresa'), ('Theresa', 'father', 'Clarence')]}]
['mother', 'father']