[Rosetta] invited her grandfather [Clarence] and her sister [Charlotte] over to her house for dinner.
('Charlotte', 'Clarence')
[Rosetta] invited her grandfather [Clarence] and her sister [Charlotte] over to her house for dinner.
[{('Charlotte', 'grandfather', 'Clarence'): [('Charlotte', 'sister', 'Rosetta'), ('Rosetta', 'grandfather', 'Clarence')]}]
['sister', 'grandfather']