[Stephanie] invited her son [Michael] to dinner, but not his wife [Bridget].
('Stephanie', 'Bridget')
[Stephanie] invited her son [Michael] to dinner, but not his wife [Bridget].
[{('Stephanie', 'daughter-in-law', 'Bridget'): [('Stephanie', 'son', 'Michael'), ('Michael', 'wife', 'Bridget')]}]