[Arthur] is in the same grade as his sister [Rosalee], but his sister [Suanne] is 2 years ahead of him.
('Rosalee', 'Suanne')
[Arthur] is in the same grade as his sister [Rosalee], but his sister [Suanne] is 2 years ahead of him.
[{('Rosalee', 'sister', 'Suanne'): [('Rosalee', 'brother', 'Arthur'), ('Arthur', 'sister', 'Suanne')]}]