[Nicholas] and his brother [Dale] like to go to the movies every weekend. [Nancy] has started to accompany her brother [Dale] to the movies whenever he goes.
('Nancy', 'Nicholas')
[Nicholas] and his brother [Dale] like to go to the movies every weekend. [Nancy] has started to accompany her brother [Dale] to the movies whenever he goes.
[{('Nancy', 'brother', 'Nicholas'): [('Nancy', 'brother', 'Dale'), ('Dale', 'brother', 'Nicholas')]}]
['brother', 'brother']