[Charles] wanted to get his brother [Chris] a Christmas gift so he asked his mother what she thought he would like. She said he liked video games. [David] enjoys hanging out with her sister, [Lena]. Sometimes [Lena]'s son, [Charles], takes them out for lunch.
('David', 'Chris')
[David] enjoys hanging out with her sister, [Lena]. Sometimes [Lena]'s son, [Charles], takes them out for lunch. [Charles] wanted to get his brother [Chris] a Christmas gift so he asked his mother what she thought he would like. She said he liked video games.
[{('David', 'nephew', 'Chris'): [('David', 'sister', 'Lena'), ('Lena', 'son', 'Chris')]}, {('Lena', 'son', 'Chris'): [('Lena', 'son', 'Charles'), ('Charles', 'brother', 'Chris')]}]
['sister', 'son', 'brother']