[Wayne] called his brother [Dale] on Friday because it was his birthday. [Wayne] and his brother [Nicholas] went to the park. They threw a ball around and played with their dog.
('Nicholas', 'Dale')
[Wayne] and his brother [Nicholas] went to the park. They threw a ball around and played with their dog. [Wayne] called his brother [Dale] on Friday because it was his birthday.
[{('Nicholas', 'brother', 'Dale'): [('Nicholas', 'brother', 'Wayne'), ('Wayne', 'brother', 'Dale')]}]
['brother', 'brother']