[Antonio]'s son, [Bernardo], was ill and needed to be picked up at school. [Antonio] hurried to his side. [Louis] is a great uncle of [Bettie]. [Robert]'s brother, [Louis], recently got elected as a senator. [Bernardo] made dinner reservations for his sister [Bettie].
('Antonio', 'Robert')
[Antonio]'s son, [Bernardo], was ill and needed to be picked up at school. [Antonio] hurried to his side. [Bernardo] made dinner reservations for his sister [Bettie]. [Louis] is a great uncle of [Bettie]. [Robert]'s brother, [Louis], recently got elected as a senator.
[{('Antonio', 'brother', 'Robert'): [('Antonio', 'brother', 'Louis'), ('Louis', 'brother', 'Robert')]}, {('Antonio', 'brother', 'Louis'): [('Antonio', 'daughter', 'Bettie'), ('Bettie', 'uncle', 'Louis')]}, {('Antonio', 'daughter', 'Bettie'): [('Antonio', 'son', 'Bernardo'), ('Bernardo', 'sister', 'Bettie')]}]
['son', 'sister', 'uncle', 'brother']