[Nancy] is [Jacob]'s mother. She takes very good care of him. [Nancy] was playing in the sandbox with her brother [Nicholas].
('Jacob', 'Nicholas')
[Nancy] is [Jacob]'s mother. She takes very good care of him. [Nancy] was playing in the sandbox with her brother [Nicholas].
[{('Jacob', 'uncle', 'Nicholas'): [('Jacob', 'mother', 'Nancy'), ('Nancy', 'brother', 'Nicholas')]}]
['mother', 'brother']