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