[Nicholas]'s father, [Clarence], became ill at work and requested that his daughter, [Nancy], pick him up from work.
('Nicholas', 'Nancy')
[Nicholas]'s father, [Clarence], became ill at work and requested that his daughter, [Nancy], pick him up from work.
[{('Nicholas', 'sister', 'Nancy'): [('Nicholas', 'father', 'Clarence'), ('Clarence', 'daughter', 'Nancy')]}]
['father', 'daughter']