[George] took his daughter [April] to the bookstore, and bought her some books from her favorite author. [Jerry] took his sister [April] out to dinner for her birthday.
('George', 'Jerry')
[George] took his daughter [April] to the bookstore, and bought her some books from her favorite author. [Jerry] took his sister [April] out to dinner for her birthday.
[{('George', 'son', 'Jerry'): [('George', 'daughter', 'April'), ('April', 'brother', 'Jerry')]}]
['daughter', 'brother']