[Glen] is helping his mother [Amy] pick out a gift. [Amy] wants to buy something special for her sister [Nancy].
('Nancy', 'Glen')
[Glen] is helping his mother [Amy] pick out a gift. [Amy] wants to buy something special for her sister [Nancy].
[{('Nancy', 'nephew', 'Glen'): [('Nancy', 'sister', 'Amy'), ('Amy', 'son', 'Glen')]}]
['sister', 'son']