[Tina] took her mother, [Lena], out for lunch. [Lena] wanted her son [Irvin] to pick up her medicine at the local pharmacy. [Irvin] was working so he asked his brother [Chris] if would do it and he said yes.
('Tina', 'Chris')
[Tina] took her mother, [Lena], out for lunch. [Lena] wanted her son [Irvin] to pick up her medicine at the local pharmacy. [Irvin] was working so he asked his brother [Chris] if would do it and he said yes.
[{('Tina', 'brother', 'Chris'): [('Tina', 'brother', 'Irvin'), ('Irvin', 'brother', 'Chris')]}, {('Tina', 'brother', 'Irvin'): [('Tina', 'mother', 'Lena'), ('Lena', 'son', 'Irvin')]}]
['mother', 'son', 'brother']