[Theodore]'s mother, [Lena], was worried about him. He had n't been eating. [Lena] wanted her daughter, [Tina], to go shopping with her. [Tina] invited her sister, [Mildred].
('Theodore', 'Mildred')
[Theodore]'s mother, [Lena], was worried about him. He had n't been eating. [Lena] wanted her daughter, [Tina], to go shopping with her. [Tina] invited her sister, [Mildred].
[{('Theodore', 'sister', 'Mildred'): [('Theodore', 'sister', 'Tina'), ('Tina', 'sister', 'Mildred')]}, {('Theodore', 'sister', 'Tina'): [('Theodore', 'mother', 'Lena'), ('Lena', 'daughter', 'Tina')]}]
['mother', 'daughter', 'sister']