[Louis] was delighted to watch his son [Samuel] steal third base in the Championship baseball game. [Dorothy]'s daughter, [Annie], just graduated high school. [Louis] took his brother [Robert] to get lunch at a local diner. [Dorothy] went with her nephew [Samuel] to pick out a pet puppy for his birthday.
('Robert', 'Annie')
[Louis] took his brother [Robert] to get lunch at a local diner. [Louis] was delighted to watch his son [Samuel] steal third base in the Championship baseball game. [Dorothy] went with her nephew [Samuel] to pick out a pet puppy for his birthday. [Dorothy]'s daughter, [Annie], just graduated high school.
[{('Robert', 'niece', 'Annie'): [('Robert', 'sister', 'Dorothy'), ('Dorothy', 'daughter', 'Annie')]}, {('Robert', 'sister', 'Dorothy'): [('Robert', 'brother', 'Louis'), ('Louis', 'sister', 'Dorothy')]}, {('Louis', 'sister', 'Dorothy'): [('Louis', 'son', 'Samuel'), ('Samuel', 'aunt', 'Dorothy')]}]
['brother', 'son', 'aunt', 'daughter']