[Charles] threw an anniversary party for his wife, [Tina]. [Chris]'s brother [Charles] and mother [Lena] met him early in the morning before his college graduation.
('Tina', 'Lena')
[Charles] threw an anniversary party for his wife, [Tina]. [Chris]'s brother [Charles] and mother [Lena] met him early in the morning before his college graduation.
[{('Tina', 'mother-in-law', 'Lena'): [('Tina', 'husband', 'Charles'), ('Charles', 'mother', 'Lena')]}, {('Charles', 'mother', 'Lena'): [('Charles', 'brother', 'Chris'), ('Chris', 'mother', 'Lena')]}]
['husband', 'brother', 'mother']