[Lillian] went shopping with her son [Jerry] and her brother [Wayne].
('Wayne', 'Jerry')
[Lillian] went shopping with her son [Jerry] and her brother [Wayne].
[{('Wayne', 'nephew', 'Jerry'): [('Wayne', 'sister', 'Lillian'), ('Lillian', 'son', 'Jerry')]}]
['sister', 'son']