[Amy] and her brother [George] had a good relationship. [George] did n't have such a good relationship with his son [Timothy].
('Amy', 'Timothy')
[Amy] and her brother [George] had a good relationship. [George] did n't have such a good relationship with his son [Timothy].
[{('Amy', 'nephew', 'Timothy'): [('Amy', 'brother', 'George'), ('George', 'son', 'Timothy')]}]
['brother', 'son']