[Louis]'s brother [Antonio] missed the bus and was late for school so, [Louis]'s sister [Marie] decided to drop him off. [Marie] talks to her sister, [Dorothy], a couple times a day. [Dorothy]'s brother, [Robert], only talks to her once a year.
('Antonio', 'Robert')
[Louis]'s brother [Antonio] missed the bus and was late for school so, [Louis]'s sister [Marie] decided to drop him off. [Marie] talks to her sister, [Dorothy], a couple times a day. [Dorothy]'s brother, [Robert], only talks to her once a year.
[{('Antonio', 'brother', 'Robert'): [('Antonio', 'brother', 'Louis'), ('Louis', 'brother', 'Robert')]}, {('Louis', 'brother', 'Robert'): [('Louis', 'sister', 'Dorothy'), ('Dorothy', 'brother', 'Robert')]}, {('Louis', 'sister', 'Dorothy'): [('Louis', 'sister', 'Marie'), ('Marie', 'sister', 'Dorothy')]}]
['brother', 'sister', 'sister', 'brother']