[Kevin] and his wife, [Linda], get along well, except for one thing. [Kevin] thinks [Linda]'s mother, [Nancy], stops by to visit them far too often.
('Kevin', 'Nancy')
[Kevin] and his wife, [Linda], get along well, except for one thing. [Kevin] thinks [Linda]'s mother, [Nancy], stops by to visit them far too often.
[{('Kevin', 'mother-in-law', 'Nancy'): [('Kevin', 'wife', 'Linda'), ('Linda', 'mother', 'Nancy')]}]
['wife', 'mother']