[Chris] and his brother [Charles] went to the arcade. They had a wonderful time. [Lynn] was playing hide-and-seek with her sister [Lena]. [Lena] has a son called [Charles]. Each day they go to the park after school.
('Lynn', 'Chris')
[Lynn] was playing hide-and-seek with her sister [Lena]. [Lena] has a son called [Charles]. Each day they go to the park after school. [Chris] and his brother [Charles] went to the arcade. They had a wonderful time.
[{('Lynn', 'nephew', 'Chris'): [('Lynn', 'sister', 'Lena'), ('Lena', 'son', 'Chris')]}, {('Lena', 'son', 'Chris'): [('Lena', 'son', 'Charles'), ('Charles', 'brother', 'Chris')]}]
['sister', 'son', 'brother']