[Nicholas] went to the park with his father, [Clarence]. [Nicholas] has a great father relationship with the beautiful [Mary].
('Mary', 'Clarence')
[Nicholas] has a great father relationship with the beautiful [Mary]. [Nicholas] went to the park with his father, [Clarence].
[{('Mary', 'grandfather', 'Clarence'): [('Mary', 'father', 'Nicholas'), ('Nicholas', 'father', 'Clarence')]}]
['father', 'father']