[Nicolas] is [Travis]'s Brother. [Rosetta] and [Nicolas] had a picnic at the park. They had sandwiches and salad.
('Travis', 'Rosetta')
[Nicolas] is [Travis]'s Brother. [Rosetta] and [Nicolas] had a picnic at the park. They had sandwiches and salad.
[{('Travis', 'sister', 'Rosetta'): [('Travis', 'brother', 'Nicolas'), ('Nicolas', 'sister', 'Rosetta')]}]
['brother', 'sister']