[Nicholas] and his brother [Wayne] went to the arcade. They had a wonderful time. [Nicholas] wanted to buy his mother, [Ashley], a birthday present. But he did n't know what to get her.
('Wayne', 'Ashley')
[Nicholas] and his brother [Wayne] went to the arcade. They had a wonderful time. [Nicholas] wanted to buy his mother, [Ashley], a birthday present. But he did n't know what to get her.
[{('Wayne', 'mother', 'Ashley'): [('Wayne', 'brother', 'Nicholas'), ('Nicholas', 'mother', 'Ashley')]}]
['brother', 'mother']