[Dale] helped his brother, [Nicholas], study for the chemistry exam. [Nicholas] is [Jennifer]'s father.
('Dale', 'Jennifer')
[Dale] helped his brother, [Nicholas], study for the chemistry exam. [Nicholas] is [Jennifer]'s father.
[{('Dale', 'niece', 'Jennifer'): [('Dale', 'brother', 'Nicholas'), ('Nicholas', 'daughter', 'Jennifer')]}]
['brother', 'daughter']