[Nicolas] took his mother [Theresa] out for brunch on Mother's day. [Nicolas]'s wife [Charlotte] joined them.
('Charlotte', 'Theresa')
[Nicolas] took his mother [Theresa] out for brunch on Mother's day. [Nicolas]'s wife [Charlotte] joined them.
[{('Charlotte', 'mother-in-law', 'Theresa'): [('Charlotte', 'husband', 'Nicolas'), ('Nicolas', 'mother', 'Theresa')]}]
['husband', 'mother']