[Nancy] and her son [Robert] went shopping to get [Nancy] 'husband [Wayne] a birthday gift yesterday.
('Wayne', 'Robert')
[Nancy] and her son [Robert] went shopping to get [Nancy] 'husband [Wayne] a birthday gift yesterday.
[{('Wayne', 'son', 'Robert'): [('Wayne', 'wife', 'Nancy'), ('Nancy', 'son', 'Robert')]}]
['wife', 'son']