[George] was angry with his brother [Dale] for forgetting to pick him up from school. [Dale] took his daughter [Belva] to the bookstore, and bought her some books from her favorite author.
('George', 'Belva')
[George] was angry with his brother [Dale] for forgetting to pick him up from school. [Dale] took his daughter [Belva] to the bookstore, and bought her some books from her favorite author.
[{('George', 'niece', 'Belva'): [('George', 'brother', 'Dale'), ('Dale', 'daughter', 'Belva')]}]
['brother', 'daughter']