[John] got mad at his brother [Ernest] after he stole his pretzels. [John] went to [Mary]'s house for dinner.
('Ernest', 'Mary')
[John] got mad at his brother [Ernest] after he stole his pretzels. [John] went to [Mary]'s house for dinner.
[{('Ernest', 'mother', 'Mary'): [('Ernest', 'brother', 'John'), ('John', 'mother', 'Mary')]}]