[Cheryl] invited her father [Pedro] to dinner. [Dorothy] took her daughter [Cheryl] to see her very first ballet performance. [Pedro] love his brother [Antonio]. They are always playing together. [Dorothy] was mad at her brother [Robert], because [Robert] had called her fat.
('Antonio', 'Robert')
[Pedro] love his brother [Antonio]. They are always playing together. [Cheryl] invited her father [Pedro] to dinner. [Dorothy] took her daughter [Cheryl] to see her very first ballet performance. [Dorothy] was mad at her brother [Robert], because [Robert] had called her fat.
[{('Antonio', 'brother', 'Robert'): [('Antonio', 'brother', 'Pedro'), ('Pedro', 'brother', 'Robert')]}, {('Pedro', 'brother', 'Robert'): [('Pedro', 'daughter', 'Cheryl'), ('Cheryl', 'uncle', 'Robert')]}, {('Cheryl', 'uncle', 'Robert'): [('Cheryl', 'mother', 'Dorothy'), ('Dorothy', 'brother', 'Robert')]}]
['brother', 'daughter', 'mother', 'brother']