[Theresa] and her sister [Wayne] went to the ice cream shop. [George]'s sister [Theresa] asked him for some help planting her garden.
('Wayne', 'George')
[Theresa] and her sister [Wayne] went to the ice cream shop. [George]'s sister [Theresa] asked him for some help planting her garden.
[{('Wayne', 'brother', 'George'): [('Wayne', 'sister', 'Theresa'), ('Theresa', 'brother', 'George')]}]
['sister', 'brother']