[George] and his sister [Nancy] went out for coffee. [Nancy] asked her brother [Dale] if he wanted them to bring him anything back, but he said no.
('George', 'Dale')
[George] and his sister [Nancy] went out for coffee. [Nancy] asked her brother [Dale] if he wanted them to bring him anything back, but he said no.
[{('George', 'brother', 'Dale'): [('George', 'sister', 'Nancy'), ('Nancy', 'brother', 'Dale')]}]
['sister', 'brother']