[Dennis] asked his sister [Natalia] for some money. He was going to use the money to buy his grandfather, [Clarence], a present.
('Clarence', 'Natalia')
[Dennis] asked his sister [Natalia] for some money. He was going to use the money to buy his grandfather, [Clarence], a present.
[{('Clarence', 'granddaughter', 'Natalia'): [('Clarence', 'grandson', 'Dennis'), ('Dennis', 'sister', 'Natalia')]}]
['grandson', 'sister']