[Nicolas] and [Charlotte] decide to visit his mom [Theresa] for lunch.
('Charlotte', 'Theresa')
[Nicolas] and [Charlotte] decide to visit his mom [Theresa] for lunch.
[{('Charlotte', 'mother-in-law', 'Theresa'): [('Charlotte', 'husband', 'Nicolas'), ('Nicolas', 'mother', 'Theresa')]}]
['husband', 'mother']