[Ronald] and his brother [John] went to the boxing match. [Lizzie] was upset her brother [Ronald] did n't invite her. [Ronald] went to visit his sister [Lizzie]. But [Lizzie] was already hanging out with [Harold] which is [Ronald]'s grandfather.
('Harold', 'John')
[Ronald] went to visit his sister [Lizzie]. But [Lizzie] was already hanging out with [Harold] which is [Ronald]'s grandfather. [Ronald] and his brother [John] went to the boxing match. [Lizzie] was upset her brother [Ronald] did n't invite her.
[{('Harold', 'grandson', 'John'): [('Harold', 'granddaughter', 'Lizzie'), ('Lizzie', 'brother', 'John')]}, {('Lizzie', 'brother', 'John'): [('Lizzie', 'brother', 'Ronald'), ('Ronald', 'brother', 'John')]}, {('Harold', 'granddaughter', 'Lizzie'): [('Harold', 'grandson', 'Ronald'), ('Ronald', 'sister', 'Lizzie')]}]
['grandson', 'sister', 'brother', 'brother']