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