[George] went to his sister, [Theresa]'s, house for dinner. He brought along his daughter [April].
('Theresa', 'April')
[George] went to his sister, [Theresa]'s, house for dinner. He brought along his daughter [April].
[{('Theresa', 'niece', 'April'): [('Theresa', 'brother', 'George'), ('George', 'daughter', 'April')]}]
['brother', 'daughter']