[Theresa] loves playing chess her son. His name is [Tony]. [Tony] got mad at his brother [Travis] after he stole his pretzels.
('Travis', 'Theresa')
[Tony] got mad at his brother [Travis] after he stole his pretzels. [Theresa] loves playing chess her son. His name is [Tony].
[{('Travis', 'mother', 'Theresa'): [('Travis', 'brother', 'Tony'), ('Tony', 'mother', 'Theresa')]}]
['brother', 'mother']