[George] tripped his brother [Nicholas] in the living room. [Nicholas] is helping his son study. His name is [Milton].
('George', 'Milton')
[George] tripped his brother [Nicholas] in the living room. [Nicholas] is helping his son study. His name is [Milton].
[{('George', 'nephew', 'Milton'): [('George', 'brother', 'Nicholas'), ('Nicholas', 'son', 'Milton')]}]
['brother', 'son']