[Lillian] and her sister [Amy] braided each other's hair before school. [Lillian] likes taking her son [Jerry] to school.
('Amy', 'Jerry')
[Lillian] and her sister [Amy] braided each other's hair before school. [Lillian] likes taking her son [Jerry] to school.
[{('Amy', 'nephew', 'Jerry'): [('Amy', 'sister', 'Lillian'), ('Lillian', 'son', 'Jerry')]}]
['sister', 'son']