[Glen] and his father [Nicholas] went to the golf course in town on Saturday and had a great time. [George] called his brother [Nicholas] on Friday because it was his birthday.
('George', 'Glen')
[George] called his brother [Nicholas] on Friday because it was his birthday. [Glen] and his father [Nicholas] went to the golf course in town on Saturday and had a great time.
[{('George', 'nephew', 'Glen'): [('George', 'brother', 'Nicholas'), ('Nicholas', 'son', 'Glen')]}]
['brother', 'son']