[George] and kyle are brothers. They went out to eat with [Dale]'s sister [Nancy].
('George', 'Nancy')
[George] and kyle are brothers. They went out to eat with [Dale]'s sister [Nancy].
[{('George', 'sister', 'Nancy'): [('George', 'brother', 'Dale'), ('Dale', 'sister', 'Nancy')]}]
['brother', 'sister']