[Amy]'s husband, [Nicholas], and her son [Milton] went fishing last weekend.
('Nicholas', 'Milton')
[Amy]'s husband, [Nicholas], and her son [Milton] went fishing last weekend.
[{('Nicholas', 'son', 'Milton'): [('Nicholas', 'wife', 'Amy'), ('Amy', 'son', 'Milton')]}]
['wife', 'son']