[Lillian] took her son [Timothy] to the park for the afternoon. [Timothy] and his brother [John] played at jacks.
('Lillian', 'John')
[Lillian] took her son [Timothy] to the park for the afternoon. [Timothy] and his brother [John] played at jacks.
[{('Lillian', 'son', 'John'): [('Lillian', 'son', 'Timothy'), ('Timothy', 'brother', 'John')]}]
['son', 'brother']