[Nicholas]'s brother [Dale] and son [Dennis] worked together to put up the tire swing outside.
('Dennis', 'Dale')
[Nicholas]'s brother [Dale] and son [Dennis] worked together to put up the tire swing outside.
[{('Dennis', 'uncle', 'Dale'): [('Dennis', 'father', 'Nicholas'), ('Nicholas', 'brother', 'Dale')]}]
['father', 'brother']