[Theresa] took her son [Travis] to the mall to shop for school clothes. [Travis] went to the baseball game with his brother [Tony].
('Theresa', 'Tony')
[Theresa] took her son [Travis] to the mall to shop for school clothes. [Travis] went to the baseball game with his brother [Tony].
[{('Theresa', 'son', 'Tony'): [('Theresa', 'son', 'Travis'), ('Travis', 'brother', 'Tony')]}]
['son', 'brother']