[Nicholas]'s brother [Dale] helped him pick a birthday gift for his daughter, [Mary].
('Mary', 'Dale')
[Nicholas]'s brother [Dale] helped him pick a birthday gift for his daughter, [Mary].
[{('Mary', 'uncle', 'Dale'): [('Mary', 'father', 'Nicholas'), ('Nicholas', 'brother', 'Dale')]}]
['father', 'brother']