[Nancy] hates her son [Robert]'s wife [Lorraine]
('Lorraine', 'Nancy')
[Nancy] hates her son [Robert]'s wife [Lorraine]
[{('Lorraine', 'mother-in-law', 'Nancy'): [('Lorraine', 'husband', 'Robert'), ('Robert', 'mother', 'Nancy')]}]
['husband', 'mother']