[Nicholas] and his father, [Clarence], were having a disagreement, so they asked [Michael], [Nicholas]'s son, to settle it for them.
('Michael', 'Clarence')
[Nicholas] and his father, [Clarence], were having a disagreement, so they asked [Michael], [Nicholas]'s son, to settle it for them.
[{('Michael', 'grandfather', 'Clarence'): [('Michael', 'father', 'Nicholas'), ('Nicholas', 'father', 'Clarence')]}]
['father', 'father']