[George] and his brother [Dale] wanted to backpack across Europe together once they graduated college. [Dale] did n't get along very well with his sister [Nancy] for some reason.
('George', 'Nancy')
[George] and his brother [Dale] wanted to backpack across Europe together once they graduated college. [Dale] did n't get along very well with his sister [Nancy] for some reason.
[{('George', 'sister', 'Nancy'): [('George', 'brother', 'Dale'), ('Dale', 'sister', 'Nancy')]}]
['brother', 'sister']