[Clarence] took his granddaughter [Louise] to the park. [Robert] is a factory worker. He has a wonderful sister by the name of [Louise].
('Robert', 'Clarence')
[Robert] is a factory worker. He has a wonderful sister by the name of [Louise]. [Clarence] took his granddaughter [Louise] to the park.
[{('Robert', 'grandfather', 'Clarence'): [('Robert', 'sister', 'Louise'), ('Louise', 'grandfather', 'Clarence')]}]
['sister', 'grandfather']