[Nancy]'s brother [George] joined the Army. While he was overseas, he left his daughter, [April], in [Nancy]'s care.
('Nancy', 'April')
[Nancy]'s brother [George] joined the Army. While he was overseas, he left his daughter, [April], in [Nancy]'s care.
[{('Nancy', 'niece', 'April'): [('Nancy', 'brother', 'George'), ('George', 'daughter', 'April')]}]
['brother', 'daughter']