[Dorothy] is taking a trip to see her sister [Beverly]. [Robert] took his son [John] for boxing lessons. He felt the boy needed to toughen up. [John] and his aunt [Dorothy] are spending the day together. [Harold] and his son [Robert] went to the store to by bread.
('Harold', 'Beverly')
[Harold] and his son [Robert] went to the store to by bread. [Robert] took his son [John] for boxing lessons. He felt the boy needed to toughen up. [John] and his aunt [Dorothy] are spending the day together. [Dorothy] is taking a trip to see her sister [Beverly].
[{('Harold', 'daughter', 'Beverly'): [('Harold', 'son', 'Robert'), ('Robert', 'sister', 'Beverly')]}, {('Robert', 'sister', 'Beverly'): [('Robert', 'sister', 'Dorothy'), ('Dorothy', 'sister', 'Beverly')]}, {('Robert', 'sister', 'Dorothy'): [('Robert', 'son', 'John'), ('John', 'aunt', 'Dorothy')]}]
['son', 'son', 'aunt', 'sister']