[David] went to a movie with her sister [Lena]. [Lena] brought along her son [Irvin] who loved going to the movies with his family. [Mildred]'s brother [Irvin] and her went to get ice cream.
('David', 'Mildred')
[David] went to a movie with her sister [Lena]. [Lena] brought along her son [Irvin] who loved going to the movies with his family. [Mildred]'s brother [Irvin] and her went to get ice cream.
[{('David', 'niece', 'Mildred'): [('David', 'sister', 'Lena'), ('Lena', 'daughter', 'Mildred')]}, {('Lena', 'daughter', 'Mildred'): [('Lena', 'son', 'Irvin'), ('Irvin', 'sister', 'Mildred')]}]
['sister', 'son', 'sister']