[Antonio]'s sister, [Dorothy], bought movie tickets at a discount rate. [Robert] and his sister, [Dorothy] are taking [Robert]'s son [Mario] to see his grandmother, [Shantel].
('Antonio', 'Shantel')
[Antonio]'s sister, [Dorothy], bought movie tickets at a discount rate. [Robert] and his sister, [Dorothy] are taking [Robert]'s son [Mario] to see his grandmother, [Shantel].
[{('Antonio', 'mother', 'Shantel'): [('Antonio', 'brother', 'Robert'), ('Robert', 'mother', 'Shantel')]}, {('Robert', 'mother', 'Shantel'): [('Robert', 'son', 'Mario'), ('Mario', 'grandmother', 'Shantel')]}, {('Antonio', 'brother', 'Robert'): [('Antonio', 'sister', 'Dorothy'), ('Dorothy', 'brother', 'Robert')]}]
['sister', 'brother', 'son', 'grandmother']