[Theresa]'s son [Tony] and brother [Wayne] came to her birthday party last weekend.
('Wayne', 'Tony')
[Theresa]'s son [Tony] and brother [Wayne] came to her birthday party last weekend.
[{('Wayne', 'nephew', 'Tony'): [('Wayne', 'sister', 'Theresa'), ('Theresa', 'son', 'Tony')]}]
['sister', 'son']