[Dale] and his son [Tony] went to the park to look for different kinds of birds. [Dale] called his brother [Nicholas] on Friday because it was his birthday.
('Tony', 'Nicholas')
[Dale] and his son [Tony] went to the park to look for different kinds of birds. [Dale] called his brother [Nicholas] on Friday because it was his birthday.
[{('Tony', 'uncle', 'Nicholas'): [('Tony', 'father', 'Dale'), ('Dale', 'brother', 'Nicholas')]}]
['father', 'brother']