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