[George]'s sister, [Nancy], was so happy to have him home. He was home from college. [Dale] and his sister [Nancy] stood in line at the fair.
('George', 'Dale')
[George]'s sister, [Nancy], was so happy to have him home. He was home from college. [Dale] and his sister [Nancy] stood in line at the fair.
[{('George', 'brother', 'Dale'): [('George', 'sister', 'Nancy'), ('Nancy', 'brother', 'Dale')]}]
['sister', 'brother']