[Lillian] and her son [Timothy] went to the zoo with [Lillian]'s brother [Wayne].
('Wayne', 'Timothy')
[Lillian] and her son [Timothy] went to the zoo with [Lillian]'s brother [Wayne].
[{('Wayne', 'nephew', 'Timothy'): [('Wayne', 'sister', 'Lillian'), ('Lillian', 'son', 'Timothy')]}]
['sister', 'son']