[George] invited his nephew, [Tony] to the baseball game. [Theresa] talks to her son [Tony] every day.
('Theresa', 'George')
[Theresa] talks to her son [Tony] every day. [George] invited his nephew, [Tony] to the baseball game.
[{('Theresa', 'brother', 'George'): [('Theresa', 'son', 'Tony'), ('Tony', 'uncle', 'George')]}]
['son', 'uncle']