[John] went hunting with his son, [Brent]. [Mary] had to pick her son [John] up from school because the schools' bus was broke down.
('Brent', 'Mary')
[John] went hunting with his son, [Brent]. [Mary] had to pick her son [John] up from school because the schools' bus was broke down.
[{('Brent', 'grandmother', 'Mary'): [('Brent', 'father', 'John'), ('John', 'mother', 'Mary')]}]