[Lena] has a son named [Irvin]. [Chris] hit his brother [Charles] in the head. [Chris] looks to his loving mother [Lena] for guidance in with his math homework.
('Charles', 'Irvin')
[Chris] hit his brother [Charles] in the head. [Chris] looks to his loving mother [Lena] for guidance in with his math homework. [Lena] has a son named [Irvin].
[{('Charles', 'brother', 'Irvin'): [('Charles', 'brother', 'Chris'), ('Chris', 'brother', 'Irvin')]}, {('Chris', 'brother', 'Irvin'): [('Chris', 'mother', 'Lena'), ('Lena', 'son', 'Irvin')]}]
['brother', 'mother', 'son']