[Kevin]'s wife [Linda] is going out to brunch with [Kevin]'s mother [Nancy].
('Nancy', 'Linda')
[Kevin]'s wife [Linda] is going out to brunch with [Kevin]'s mother [Nancy].
[{('Nancy', 'daughter-in-law', 'Linda'): [('Nancy', 'son', 'Kevin'), ('Kevin', 'wife', 'Linda')]}]
['son', 'wife']