[Douglas] called his brother [Timothy] on Friday because it was his birthday. [Jerry] is happy that his brother, [Douglas], is becoming successful.
('Jerry', 'Timothy')
[Jerry] is happy that his brother, [Douglas], is becoming successful. [Douglas] called his brother [Timothy] on Friday because it was his birthday.
[{('Jerry', 'brother', 'Timothy'): [('Jerry', 'brother', 'Douglas'), ('Douglas', 'brother', 'Timothy')]}]
['brother', 'brother']