[Michael]'s grandfather [Clarence] helped his mother, [Amy], repaint her house today.
('Amy', 'Clarence')
[Michael]'s grandfather [Clarence] helped his mother, [Amy], repaint her house today.
[{('Amy', 'father', 'Clarence'): [('Amy', 'son', 'Michael'), ('Michael', 'grandfather', 'Clarence')]}]
['son', 'grandfather']