[Robert] scolded his son, [Mario], for pulling [Robert]'s daughter's braids. [Robert]'s daughter, [Lizzie], was quite distressed at having her braids pulled. [Harold] took his grandson [John] to the zoo. [John]'s brother [Mario] went to the aquarium instead.
('Harold', 'Lizzie')
[Harold] took his grandson [John] to the zoo. [John]'s brother [Mario] went to the aquarium instead. [Robert] scolded his son, [Mario], for pulling [Robert]'s daughter's braids. [Robert]'s daughter, [Lizzie], was quite distressed at having her braids pulled.
[{('Harold', 'granddaughter', 'Lizzie'): [('Harold', 'grandson', 'Mario'), ('Mario', 'sister', 'Lizzie')]}, {('Harold', 'grandson', 'Mario'): [('Harold', 'grandson', 'John'), ('John', 'brother', 'Mario')]}, {('Mario', 'sister', 'Lizzie'): [('Mario', 'father', 'Robert'), ('Robert', 'daughter', 'Lizzie')]}]
['grandson', 'brother', 'father', 'daughter']