[Dale] has been trying all day to reach his daughter [June] on the phone. [Nicholas] helped his brother, [Dale], study for the chemistry exam.
('Nicholas', 'June')
[Nicholas] helped his brother, [Dale], study for the chemistry exam. [Dale] has been trying all day to reach his daughter [June] on the phone.
[{('Nicholas', 'niece', 'June'): [('Nicholas', 'brother', 'Dale'), ('Dale', 'daughter', 'June')]}]
['brother', 'daughter']