[Tony] and his brother [Nicolas] are fighting again. [Theresa] has an amazing son. Her son [Tony] is very talented.
('Nicolas', 'Theresa')
[Tony] and his brother [Nicolas] are fighting again. [Theresa] has an amazing son. Her son [Tony] is very talented.
[{('Nicolas', 'mother', 'Theresa'): [('Nicolas', 'brother', 'Tony'), ('Tony', 'mother', 'Theresa')]}]
['brother', 'mother']