[Milton] and his wife [Mary] made fresh bread for lunch. [Nicholas], [Milton]'s father, came over and brought salad to share.
('Mary', 'Nicholas')
[Milton] and his wife [Mary] made fresh bread for lunch. [Nicholas], [Milton]'s father, came over and brought salad to share.
[{('Mary', 'father-in-law', 'Nicholas'): [('Mary', 'husband', 'Milton'), ('Milton', 'father', 'Nicholas')]}]
['husband', 'father']