[Amy]'s son [Dennis] missed seeing his mother on the weekends. [Lillian] took her sister [Amy] out for dinner to celebrate her birthday.
('Dennis', 'Lillian')
[Amy]'s son [Dennis] missed seeing his mother on the weekends. [Lillian] took her sister [Amy] out for dinner to celebrate her birthday.
[{('Dennis', 'aunt', 'Lillian'): [('Dennis', 'mother', 'Amy'), ('Amy', 'sister', 'Lillian')]}]
['mother', 'sister']