[Cheryl] was playing hide-and-seek with her sister [Heather]. [Dorothy] loved to play dress-up with her daughter [Cheryl]. [Robert] treated his brother [Pedro] to lunch. [Pedro] brought along his daughter, [Heather].
('Dorothy', 'Robert')
[Dorothy] loved to play dress-up with her daughter [Cheryl]. [Cheryl] was playing hide-and-seek with her sister [Heather]. [Robert] treated his brother [Pedro] to lunch. [Pedro] brought along his daughter, [Heather].
[{('Dorothy', 'brother', 'Robert'): [('Dorothy', 'daughter', 'Cheryl'), ('Cheryl', 'uncle', 'Robert')]}, {('Cheryl', 'uncle', 'Robert'): [('Cheryl', 'father', 'Pedro'), ('Pedro', 'brother', 'Robert')]}, {('Cheryl', 'father', 'Pedro'): [('Cheryl', 'sister', 'Heather'), ('Heather', 'father', 'Pedro')]}]
['daughter', 'sister', 'father', 'brother']