[Chris] and his brother [Charles] wanted to go to the arcade. [Charles] asked his mother, [Lena], if they could, and she said yes. [David] and her sister [Lena] played golf together. [David] won easily.
('Chris', 'David')
[Chris] and his brother [Charles] wanted to go to the arcade. [Charles] asked his mother, [Lena], if they could, and she said yes. [David] and her sister [Lena] played golf together. [David] won easily.
[{('Chris', 'aunt', 'David'): [('Chris', 'mother', 'Lena'), ('Lena', 'sister', 'David')]}, {('Chris', 'mother', 'Lena'): [('Chris', 'brother', 'Charles'), ('Charles', 'mother', 'Lena')]}]
['brother', 'mother', 'sister']