[George] and his daughter, [April] go to concerts every week. [April] is looking for a good gift for her sister [Andrea].
('George', 'Andrea')
[George] and his daughter, [April] go to concerts every week. [April] is looking for a good gift for her sister [Andrea].
[{('George', 'daughter', 'Andrea'): [('George', 'daughter', 'April'), ('April', 'sister', 'Andrea')]}]
['daughter', 'sister']