[Marie] takes her son [Mario] to the park every Saturday. [Robert] bought his wife, [Marie], a new necklace. [John] wanted to go to his grandmother [Shantel]'s house. His brother [Mario] did n't go with him.
('Robert', 'Shantel')
[Robert] bought his wife, [Marie], a new necklace. [Marie] takes her son [Mario] to the park every Saturday. [John] wanted to go to his grandmother [Shantel]'s house. His brother [Mario] did n't go with him.
[{('Robert', 'mother', 'Shantel'): [('Robert', 'son', 'Mario'), ('Mario', 'grandmother', 'Shantel')]}, {('Mario', 'grandmother', 'Shantel'): [('Mario', 'brother', 'John'), ('John', 'grandmother', 'Shantel')]}, {('Robert', 'son', 'Mario'): [('Robert', 'wife', 'Marie'), ('Marie', 'son', 'Mario')]}]
['wife', 'son', 'brother', 'grandmother']