[Amy] called her dad [Clarence] to pick her up from school. [Amy] was honored to take her son [Milton] to the mother son dance at her son's school last Friday.
('Milton', 'Clarence')
[Amy] was honored to take her son [Milton] to the mother son dance at her son's school last Friday. [Amy] called her dad [Clarence] to pick her up from school.
[{('Milton', 'grandfather', 'Clarence'): [('Milton', 'mother', 'Amy'), ('Amy', 'father', 'Clarence')]}]
['mother', 'father']