[Milton]'s mother, [Amy], was worried about him. He had n't been eating. [Jennifer] and her brother [Milton] were having a wonderful time at Disneyland.
('Jennifer', 'Amy')
[Jennifer] and her brother [Milton] were having a wonderful time at Disneyland. [Milton]'s mother, [Amy], was worried about him. He had n't been eating.
[{('Jennifer', 'mother', 'Amy'): [('Jennifer', 'brother', 'Milton'), ('Milton', 'mother', 'Amy')]}]
['brother', 'mother']