[Charlotte] and [Rosetta] are sisters who have one brother named [Travis].
('Rosetta', 'Charlotte')
[Charlotte] and [Rosetta] are sisters who have one brother named [Travis].
[{('Rosetta', 'sister', 'Charlotte'): [('Rosetta', 'brother', 'Travis'), ('Travis', 'sister', 'Charlotte')]}]
['brother', 'sister']