[Douglas] got into an argument with his brother [Jerry] and pushed him to the floor. As he burst into tears [Douglas] ran to his mother [Lillian] for comfort.
('Lillian', 'Jerry')
[Douglas] got into an argument with his brother [Jerry] and pushed him to the floor. As he burst into tears [Douglas] ran to his mother [Lillian] for comfort.
[{('Lillian', 'son', 'Jerry'): [('Lillian', 'son', 'Douglas'), ('Douglas', 'brother', 'Jerry')]}]
['son', 'brother']