[Robert] bought a present for his son [Ronald]. His daughter [Lizzie] felt let out. [Robert] walked his daughters [Lizzie] and [Angelica] to school.
('Angelica', 'Ronald')
[Robert] walked his daughters [Lizzie] and [Angelica] to school. [Robert] bought a present for his son [Ronald]. His daughter [Lizzie] felt let out.
[{('Angelica', 'brother', 'Ronald'): [('Angelica', 'sister', 'Lizzie'), ('Lizzie', 'brother', 'Ronald')]}, {('Lizzie', 'brother', 'Ronald'): [('Lizzie', 'father', 'Robert'), ('Robert', 'son', 'Ronald')]}, {('Angelica', 'sister', 'Lizzie'): [('Angelica', 'father', 'Robert'), ('Robert', 'daughter', 'Lizzie')]}]
['father', 'daughter', 'father', 'son']