[Jennifer] took a photo of her father [Nicholas] for the family album. [Nicholas] loved teaching his son, [Dennis], baseball.
('Jennifer', 'Dennis')
[Jennifer] took a photo of her father [Nicholas] for the family album. [Nicholas] loved teaching his son, [Dennis], baseball.
[{('Jennifer', 'brother', 'Dennis'): [('Jennifer', 'father', 'Nicholas'), ('Nicholas', 'son', 'Dennis')]}]
['father', 'son']