[Cheryl] has a sister named [Rebecca] and a brother named [James]. [Dorothy] scolded her son [Jeffrey] for leaving the front door unlocked. [Jeffrey] blamed the unlocked door on his sister [Cheryl].
('Dorothy', 'Rebecca')
[Dorothy] scolded her son [Jeffrey] for leaving the front door unlocked. [Jeffrey] blamed the unlocked door on his sister [Cheryl]. [Cheryl] has a sister named [Rebecca] and a brother named [James].
[{('Dorothy', 'daughter', 'Rebecca'): [('Dorothy', 'daughter', 'Cheryl'), ('Cheryl', 'sister', 'Rebecca')]}, {('Cheryl', 'sister', 'Rebecca'): [('Cheryl', 'brother', 'James'), ('James', 'sister', 'Rebecca')]}, {('Dorothy', 'daughter', 'Cheryl'): [('Dorothy', 'son', 'Jeffrey'), ('Jeffrey', 'sister', 'Cheryl')]}]
['son', 'sister', 'brother', 'sister']