[Dale] and his sister [Nancy] were painting the front of the house. [Dale]'s brother, [George], was repairing the shutters.
('George', 'Nancy')
[Dale] and his sister [Nancy] were painting the front of the house. [Dale]'s brother, [George], was repairing the shutters.
[{('George', 'sister', 'Nancy'): [('George', 'brother', 'Dale'), ('Dale', 'sister', 'Nancy')]}]
['brother', 'sister']