[James] did n't get along very well with his sister [Rosetta] for some reason. [Belva] was sewing a sweater for her sister [Rosetta].
('James', 'Belva')
[James] did n't get along very well with his sister [Rosetta] for some reason. [Belva] was sewing a sweater for her sister [Rosetta].
[{('James', 'sister', 'Belva'): [('James', 'sister', 'Rosetta'), ('Rosetta', 'sister', 'Belva')]}]
['sister', 'sister']