[Frances] dropped off her son [Joshua] at basketball practice. After, she went to pick up her daughter, [Lena], from the pool. [Lena] took her son, [Charles], to the movie theater for his birthday.
('Joshua', 'Charles')
[Frances] dropped off her son [Joshua] at basketball practice. After, she went to pick up her daughter, [Lena], from the pool. [Lena] took her son, [Charles], to the movie theater for his birthday.
[{('Joshua', 'nephew', 'Charles'): [('Joshua', 'sister', 'Lena'), ('Lena', 'son', 'Charles')]}, {('Joshua', 'sister', 'Lena'): [('Joshua', 'mother', 'Frances'), ('Frances', 'daughter', 'Lena')]}]
['mother', 'daughter', 'son']