[Andrea] and her mother [Lillian] went shopping for [Andrea]'s husband [John]'s birthday.
('John', 'Lillian')
[Andrea] and her mother [Lillian] went shopping for [Andrea]'s husband [John]'s birthday.
[{('John', 'mother-in-law', 'Lillian'): [('John', 'wife', 'Andrea'), ('Andrea', 'mother', 'Lillian')]}]
['wife', 'mother']