[Lorraine] was celebrating her birthday with her mother [Nancy]. [Robert] prepared romantic dinner for Valentine's Day for his wife, [Lorraine].
('Robert', 'Nancy')
[Robert] prepared romantic dinner for Valentine's Day for his wife, [Lorraine]. [Lorraine] was celebrating her birthday with her mother [Nancy].
[{('Robert', 'mother-in-law', 'Nancy'): [('Robert', 'wife', 'Lorraine'), ('Lorraine', 'mother', 'Nancy')]}]
['wife', 'mother']