[Lena] took her daughter, [Mildred], to lunch. [Theodore] and his brother [Irvin] are very close. [Irvin] does not get along well with his sister [Mildred].
('Theodore', 'Lena')
[Theodore] and his brother [Irvin] are very close. [Irvin] does not get along well with his sister [Mildred]. [Lena] took her daughter, [Mildred], to lunch.
[{('Theodore', 'mother', 'Lena'): [('Theodore', 'brother', 'Irvin'), ('Irvin', 'mother', 'Lena')]}, {('Irvin', 'mother', 'Lena'): [('Irvin', 'sister', 'Mildred'), ('Mildred', 'mother', 'Lena')]}]
['brother', 'sister', 'mother']