[Clarence] drove his daughter [Theresa] to soccer practice. [Nancy] is looking for a good gift for her sister [Theresa].
('Nancy', 'Clarence')
[Nancy] is looking for a good gift for her sister [Theresa]. [Clarence] drove his daughter [Theresa] to soccer practice.
[{('Nancy', 'father', 'Clarence'): [('Nancy', 'sister', 'Theresa'), ('Theresa', 'father', 'Clarence')]}]
['sister', 'father']