[Matthew] helped his brother, [John], study for the chemistry exam. [Crystal] was celebrating her birthday with her mother [Helen]. [Helen] does n't like having to babysit her younger brother, [Matthew].
('Crystal', 'John')
[Crystal] was celebrating her birthday with her mother [Helen]. [Helen] does n't like having to babysit her younger brother, [Matthew]. [Matthew] helped his brother, [John], study for the chemistry exam.
[{('Crystal', 'uncle', 'John'): [('Crystal', 'mother', 'Helen'), ('Helen', 'brother', 'John')]}, {('Helen', 'brother', 'John'): [('Helen', 'brother', 'Matthew'), ('Matthew', 'brother', 'John')]}]