[Dorothy] and her brother [Louis] were having a wonderful time at Disneyland. [Dorothy] went with her nephew [Ronald] to pick out a pet puppy for his birthday. [Paul]'s father [Louis] is going to coach the team this year. [Robert] is helping his son study. His name is [Ronald].
('Robert', 'Paul')
[Robert] is helping his son study. His name is [Ronald]. [Dorothy] went with her nephew [Ronald] to pick out a pet puppy for his birthday. [Dorothy] and her brother [Louis] were having a wonderful time at Disneyland. [Paul]'s father [Louis] is going to coach the team this year.
[{('Robert', 'nephew', 'Paul'): [('Robert', 'brother', 'Louis'), ('Louis', 'son', 'Paul')]}, {('Robert', 'brother', 'Louis'): [('Robert', 'sister', 'Dorothy'), ('Dorothy', 'brother', 'Louis')]}, {('Robert', 'sister', 'Dorothy'): [('Robert', 'son', 'Ronald'), ('Ronald', 'aunt', 'Dorothy')]}]
['son', 'aunt', 'brother', 'son']