[April]'s husband is named [Douglas]. [Lillian] bought a new video game for her son [Douglas].
('April', 'Lillian')
[April]'s husband is named [Douglas]. [Lillian] bought a new video game for her son [Douglas].
[{('April', 'mother-in-law', 'Lillian'): [('April', 'husband', 'Douglas'), ('Douglas', 'mother', 'Lillian')]}]
['husband', 'mother']