[Nicholas] and his brother [George] went to the boxing match. [Theresa] was upset her brother [Nicholas] did n't invite her.
('Theresa', 'George')
[Nicholas] and his brother [George] went to the boxing match. [Theresa] was upset her brother [Nicholas] did n't invite her.
[{('Theresa', 'brother', 'George'): [('Theresa', 'brother', 'Nicholas'), ('Nicholas', 'brother', 'George')]}]
['brother', 'brother']