[Nancy] was sewing a sweater for her sister [Amy]. [Theresa] and her sister [Nancy] were fighting. They never fight long though, and they made up the next day.
('Amy', 'Theresa')
[Nancy] was sewing a sweater for her sister [Amy]. [Theresa] and her sister [Nancy] were fighting. They never fight long though, and they made up the next day.
[{('Amy', 'sister', 'Theresa'): [('Amy', 'sister', 'Nancy'), ('Nancy', 'sister', 'Theresa')]}]
['sister', 'sister']