[Ronald] is [Mario]'s Brother. [Lizzie] was swimming with her sister [Angelica]. [Lizzie]'s brother [Ronald] was tanning. [Harold] is taking his grandson [Mario] to the doctor while his mother is at work.
('Harold', 'Angelica')
[Harold] is taking his grandson [Mario] to the doctor while his mother is at work. [Ronald] is [Mario]'s Brother. [Lizzie] was swimming with her sister [Angelica]. [Lizzie]'s brother [Ronald] was tanning.
[{('Harold', 'granddaughter', 'Angelica'): [('Harold', 'grandson', 'Mario'), ('Mario', 'sister', 'Angelica')]}, {('Mario', 'sister', 'Angelica'): [('Mario', 'brother', 'Ronald'), ('Ronald', 'sister', 'Angelica')]}, {('Ronald', 'sister', 'Angelica'): [('Ronald', 'sister', 'Lizzie'), ('Lizzie', 'sister', 'Angelica')]}]
['grandson', 'brother', 'sister', 'sister']