[Amy]'s father, [Clarence], was running late picking up his daughter, [Nancy], from school.
('Amy', 'Nancy')
[Amy]'s father, [Clarence], was running late picking up his daughter, [Nancy], from school.
[{('Amy', 'sister', 'Nancy'): [('Amy', 'father', 'Clarence'), ('Clarence', 'daughter', 'Nancy')]}]
['father', 'daughter']