[Nancy] gets along with her brother [Nicholas] better than her sister [Theresa].
('Nicholas', 'Theresa')
[Nancy] gets along with her brother [Nicholas] better than her sister [Theresa].
[{('Nicholas', 'sister', 'Theresa'): [('Nicholas', 'sister', 'Nancy'), ('Nancy', 'sister', 'Theresa')]}]
['sister', 'sister']