[Amy] is so proud that [Clarence], his father, quit smoking. [Milton] was so excited to give his mother, [Amy], a really nice card for Mother's Day. He loves her very much.
('Milton', 'Clarence')
[Milton] was so excited to give his mother, [Amy], a really nice card for Mother's Day. He loves her very much. [Amy] is so proud that [Clarence], his father, quit smoking.
[{('Milton', 'grandfather', 'Clarence'): [('Milton', 'mother', 'Amy'), ('Amy', 'father', 'Clarence')]}]
['mother', 'father']