[Rosalee] and her sister [Flavia] braided each other's hair before school. [Arthur] and his sister [Rosalee] went to brunch today at the new diner.
('Flavia', 'Arthur')
[Rosalee] and her sister [Flavia] braided each other's hair before school. [Arthur] and his sister [Rosalee] went to brunch today at the new diner.
[{('Flavia', 'brother', 'Arthur'): [('Flavia', 'sister', 'Rosalee'), ('Rosalee', 'brother', 'Arthur')]}]