[Alberta] does n't like having to babysit her younger brother, [Michael]. [Carl]'s sister, [Alberta], bought movie tickets at a discount rate.
('Carl', 'Michael')
[Carl]'s sister, [Alberta], bought movie tickets at a discount rate. [Alberta] does n't like having to babysit her younger brother, [Michael].
[{('Carl', 'brother', 'Michael'): [('Carl', 'sister', 'Alberta'), ('Alberta', 'brother', 'Michael')]}]