[Lillian] took her son [Timothy] to the park for the afternoon. [Dale]'s sister, [Lillian], bought movie tickets at a discount rate.
('Dale', 'Timothy')
[Dale]'s sister, [Lillian], bought movie tickets at a discount rate. [Lillian] took her son [Timothy] to the park for the afternoon.
[{('Dale', 'nephew', 'Timothy'): [('Dale', 'sister', 'Lillian'), ('Lillian', 'son', 'Timothy')]}]
['sister', 'son']