[Louise] got a very nice gift from her grandfather [Clarence]. This made [Louise]'s sister [Heidi] very jealous.
('Clarence', 'Heidi')
[Louise] got a very nice gift from her grandfather [Clarence]. This made [Louise]'s sister [Heidi] very jealous.
[{('Clarence', 'granddaughter', 'Heidi'): [('Clarence', 'granddaughter', 'Louise'), ('Louise', 'sister', 'Heidi')]}]
['granddaughter', 'sister']