[John] asked his brother [Jacob] to help him fix his car and he said he would after he got off work. [John] bought a book for his son [Robert].
('Robert', 'Jacob')
[John] bought a book for his son [Robert]. [John] asked his brother [Jacob] to help him fix his car and he said he would after he got off work.
[{('Robert', 'uncle', 'Jacob'): [('Robert', 'father', 'John'), ('John', 'brother', 'Jacob')]}]