[Michael] asked his father [Nicholas] if he could stay home from school because he was sick. [Nicholas] checked on his son [Dennis] to see if he had a fever.
('Dennis', 'Michael')
[Michael] asked his father [Nicholas] if he could stay home from school because he was sick. [Nicholas] checked on his son [Dennis] to see if he had a fever.
[{('Dennis', 'brother', 'Michael'): [('Dennis', 'father', 'Nicholas'), ('Nicholas', 'son', 'Michael')]}]
['father', 'son']