[April]'s grandfather, [Clarence], never liked [April]'s sister, [Ann].
('Ann', 'Clarence')
[April]'s grandfather, [Clarence], never liked [April]'s sister, [Ann].
[{('Ann', 'grandfather', 'Clarence'): [('Ann', 'sister', 'April'), ('April', 'grandfather', 'Clarence')]}]
['sister', 'grandfather']