[Antonio] went to the baseball game with his son [Bobby] and his brother [Louis]. [Louis]'s sister, [Dorothy] was sick and could not join them. [Dorothy]'s brother [Robert] was going to be the star in the new show.
('Bobby', 'Robert')
[Antonio] went to the baseball game with his son [Bobby] and his brother [Louis]. [Louis]'s sister, [Dorothy] was sick and could not join them. [Dorothy]'s brother [Robert] was going to be the star in the new show.
[{('Bobby', 'uncle', 'Robert'): [('Bobby', 'father', 'Antonio'), ('Antonio', 'brother', 'Robert')]}, {('Antonio', 'brother', 'Robert'): [('Antonio', 'brother', 'Louis'), ('Louis', 'brother', 'Robert')]}, {('Louis', 'brother', 'Robert'): [('Louis', 'sister', 'Dorothy'), ('Dorothy', 'brother', 'Robert')]}]
['father', 'brother', 'sister', 'brother']