[John] called his aunt, [Theresa], and asked if she would be coming over tonight. [Theresa] said yes, and told [John] she was bringing a surprise. [George] went to pick up his son [John] from the baseball practice.
('George', 'Theresa')
[George] went to pick up his son [John] from the baseball practice. [John] called his aunt, [Theresa], and asked if she would be coming over tonight. [Theresa] said yes, and told [John] she was bringing a surprise.
[{('George', 'sister', 'Theresa'): [('George', 'son', 'John'), ('John', 'aunt', 'Theresa')]}]
['son', 'aunt']