[Bobby] is in the same grade as his sister [Evangeline], but his sister [Gloria] is 2 years ahead of him. [Marie] was talking about food with her sister [Evangeline].
('Marie', 'Gloria')
[Marie] was talking about food with her sister [Evangeline]. [Bobby] is in the same grade as his sister [Evangeline], but his sister [Gloria] is 2 years ahead of him.
[{('Marie', 'sister', 'Gloria'): [('Marie', 'brother', 'Bobby'), ('Bobby', 'sister', 'Gloria')]}, {('Marie', 'brother', 'Bobby'): [('Marie', 'sister', 'Evangeline'), ('Evangeline', 'brother', 'Bobby')]}]
['sister', 'brother', 'sister']