[Ann] and her sister [Janet] went over to [Clarence]'s house for dinner. [Janet] loves spending time with her grandfather, [Clarence].
('Ann', 'Clarence')
[Ann] and her sister [Janet] went over to [Clarence]'s house for dinner. [Janet] loves spending time with her grandfather, [Clarence].
[{('Ann', 'grandfather', 'Clarence'): [('Ann', 'sister', 'Janet'), ('Janet', 'grandfather', 'Clarence')]}]
['sister', 'grandfather']