[Nicholas] took his daughter [Emily] to see her grandfather [Clarence] after school yesterday.
('Nicholas', 'Clarence')
[Nicholas] took his daughter [Emily] to see her grandfather [Clarence] after school yesterday.
[{('Nicholas', 'father', 'Clarence'): [('Nicholas', 'daughter', 'Emily'), ('Emily', 'grandfather', 'Clarence')]}]
['daughter', 'grandfather']