[Nancy] asked her mother [Lorraine] to get a cake for her sister [Lillian] on her way back home.
('Lorraine', 'Lillian')
[Nancy] asked her mother [Lorraine] to get a cake for her sister [Lillian] on her way back home.
[{('Lorraine', 'aunt', 'Lillian'): [('Lorraine', 'mother', 'Nancy'), ('Nancy', 'sister', 'Lillian')]}]
['mother', 'sister']