[Mary] thought about how fortunate she was as she watched the sunset on the beach with her husband [Milton]. [Nicholas] and his son [Milton] went to the park to look for different kinds of birds.
('Mary', 'Nicholas')
[Mary] thought about how fortunate she was as she watched the sunset on the beach with her husband [Milton]. [Nicholas] and his son [Milton] went to the park to look for different kinds of birds.
[{('Mary', 'father-in-law', 'Nicholas'): [('Mary', 'husband', 'Milton'), ('Milton', 'father', 'Nicholas')]}]
['husband', 'father']