[Dale] went to the baseball game with his son [Tony] [Tony] went to pick up his uncle from the airport with his uncle's wife [Amy].
('Dale', 'Amy')
[Dale] went to the baseball game with his son [Tony] [Tony] went to pick up his uncle from the airport with his uncle's wife [Amy].
[{('Dale', 'sister', 'Amy'): [('Dale', 'son', 'Tony'), ('Tony', 'aunt', 'Amy')]}]
['son', 'aunt']