[Tony] and his mother, [Theresa] and his wife, [Rosetta] all have the same birthday.
('Rosetta', 'Theresa')
[Tony] and his mother, [Theresa] and his wife, [Rosetta] all have the same birthday.
[{('Rosetta', 'mother-in-law', 'Theresa'): [('Rosetta', 'husband', 'Tony'), ('Tony', 'mother', 'Theresa')]}]
['husband', 'mother']