[Emily] misses her father [Nicholas] when she is at school. [Nicholas] went to the park with his father, [Clarence].
('Emily', 'Clarence')
[Emily] misses her father [Nicholas] when she is at school. [Nicholas] went to the park with his father, [Clarence].
[{('Emily', 'grandfather', 'Clarence'): [('Emily', 'father', 'Nicholas'), ('Nicholas', 'father', 'Clarence')]}]
['father', 'father']