[George] went to the baseball game with his brother [Wayne]. [George] and his son [Douglas] went to the skating rink.
('Douglas', 'Wayne')
[George] and his son [Douglas] went to the skating rink. [George] went to the baseball game with his brother [Wayne].
[{('Douglas', 'uncle', 'Wayne'): [('Douglas', 'father', 'George'), ('George', 'brother', 'Wayne')]}]
['father', 'brother']