[Dorothy] and her nephew [Paul] went to the store to buy some new tea. [Dorothy] was trying to tell her father [Harold] that she needed help in the kitchen. [Harold] did n't hear her because he was busy playing baseball with his son [Robert]. [Louis] is helping his son study. His name is [Paul].
('Louis', 'Robert')
[Louis] is helping his son study. His name is [Paul]. [Dorothy] and her nephew [Paul] went to the store to buy some new tea. [Dorothy] was trying to tell her father [Harold] that she needed help in the kitchen. [Harold] did n't hear her because he was busy playing baseball with his son [Robert].
[{('Louis', 'brother', 'Robert'): [('Louis', 'father', 'Harold'), ('Harold', 'son', 'Robert')]}, {('Louis', 'father', 'Harold'): [('Louis', 'sister', 'Dorothy'), ('Dorothy', 'father', 'Harold')]}, {('Louis', 'sister', 'Dorothy'): [('Louis', 'son', 'Paul'), ('Paul', 'aunt', 'Dorothy')]}]
['son', 'aunt', 'father', 'son']