[Theresa] gave her brother [Wayne] a new sweater for Christmas. [Wayne] tripped his brother [George] in the living room.
('Theresa', 'George')
[Theresa] gave her brother [Wayne] a new sweater for Christmas. [Wayne] tripped his brother [George] in the living room.
[{('Theresa', 'brother', 'George'): [('Theresa', 'brother', 'Wayne'), ('Wayne', 'brother', 'George')]}]
['brother', 'brother']