[Nancy] was furious. The house was a wreck and she knew it was her son [Kevin]'s fault. His sister [Lorraine] would never be this messy.
('Lorraine', 'Nancy')
[Nancy] was furious. The house was a wreck and she knew it was her son [Kevin]'s fault. His sister [Lorraine] would never be this messy.
[{('Lorraine', 'mother', 'Nancy'): [('Lorraine', 'brother', 'Kevin'), ('Kevin', 'mother', 'Nancy')]}]
['brother', 'mother']