[Nicholas]'s son is [Dennis]. [Dennis] and his father always go fishing together on Sundays and have a great time together. [Nicholas] is a very hot guy, but his sister [Nancy] is even more attractive.
('Nancy', 'Dennis')
[Nicholas] is a very hot guy, but his sister [Nancy] is even more attractive. [Nicholas]'s son is [Dennis]. [Dennis] and his father always go fishing together on Sundays and have a great time together.
[{('Nancy', 'nephew', 'Dennis'): [('Nancy', 'brother', 'Nicholas'), ('Nicholas', 'son', 'Dennis')]}]
['brother', 'son']