[George] was so proud that his son [Timothy] won the science fair! [April] and her sister [Timothy] went to the ice cream shop.
('George', 'April')
[George] was so proud that his son [Timothy] won the science fair! [April] and her sister [Timothy] went to the ice cream shop.
[{('George', 'daughter', 'April'): [('George', 'son', 'Timothy'), ('Timothy', 'sister', 'April')]}]
['son', 'sister']