[Rich] asked his brother [John] to help him fix his car and he said he would after he got off work. [John]'s son [Bret] is in the hospital. [Bret]'s brother [Allan] accidentally hit him with a hammer.
('Rich', 'Allan')
[Rich] asked his brother [John] to help him fix his car and he said he would after he got off work. [John]'s son [Bret] is in the hospital. [Bret]'s brother [Allan] accidentally hit him with a hammer.
[{('Rich', 'nephew', 'Allan'): [('Rich', 'brother', 'John'), ('John', 'son', 'Allan')]}, {('John', 'son', 'Allan'): [('John', 'son', 'Bret'), ('Bret', 'brother', 'Allan')]}]