[David] asked her father [James] to take her to school. [James] said he'd take her in a few minutes. [Lena] brought her son [Charles] and her father [James] with her to the local swap-meet to hunt for nice antiques.
('David', 'Charles')
[David] asked her father [James] to take her to school. [James] said he'd take her in a few minutes. [Lena] brought her son [Charles] and her father [James] with her to the local swap-meet to hunt for nice antiques.
[{('David', 'nephew', 'Charles'): [('David', 'sister', 'Lena'), ('Lena', 'son', 'Charles')]}, {('David', 'sister', 'Lena'): [('David', 'father', 'James'), ('James', 'daughter', 'Lena')]}]
['father', 'daughter', 'son']