[Lillian] picked up her daughter [April] from school early. [Douglas] cooked dinner for his wife [April]
('Douglas', 'Lillian')
[Douglas] cooked dinner for his wife [April] [Lillian] picked up her daughter [April] from school early.
[{('Douglas', 'mother-in-law', 'Lillian'): [('Douglas', 'wife', 'April'), ('April', 'mother', 'Lillian')]}]
['wife', 'mother']