[Theresa] and [George] had a picnic at the park. They had sandwiches and salad. [George] and his son [Jerry] went to the park to look for different kinds of birds.
('Jerry', 'Theresa')
[George] and his son [Jerry] went to the park to look for different kinds of birds. [Theresa] and [George] had a picnic at the park. They had sandwiches and salad.
[{('Jerry', 'aunt', 'Theresa'): [('Jerry', 'father', 'George'), ('George', 'sister', 'Theresa')]}]
['father', 'sister']