[Wayne] and his brother [George] baked chocolate chip cookies for [Amy], [George]'s sister.
('Wayne', 'Amy')
[Wayne] and his brother [George] baked chocolate chip cookies for [Amy], [George]'s sister.
[{('Wayne', 'sister', 'Amy'): [('Wayne', 'brother', 'George'), ('George', 'sister', 'Amy')]}]
['brother', 'sister']