[George] was happy that his son [Douglas] was doing well in college. [Douglas] looked up to his older brother named [Timothy]. [Timothy] was very strong and quite brave and that's the reason [Douglas] admires him.
('George', 'Timothy')
[George] was happy that his son [Douglas] was doing well in college. [Douglas] looked up to his older brother named [Timothy]. [Timothy] was very strong and quite brave and that's the reason [Douglas] admires him.
[{('George', 'son', 'Timothy'): [('George', 'son', 'Douglas'), ('Douglas', 'brother', 'Timothy')]}]
['son', 'brother']