[Linda] and her mother [Nancy] planned a surprise birthday party for [Linda]'s husband [Kevin].
('Kevin', 'Nancy')
[Linda] and her mother [Nancy] planned a surprise birthday party for [Linda]'s husband [Kevin].
[{('Kevin', 'mother-in-law', 'Nancy'): [('Kevin', 'wife', 'Linda'), ('Linda', 'mother', 'Nancy')]}]
['wife', 'mother']