[Richard] got mad at his brother [Pete] after he stole his pretzels. [Anna]'s brother [Pete] was going to be the star in the new show. [Richard] and his sister [Carrie] were twins. Still, they did n't look very much alike.
('Anna', 'Carrie')
[Anna]'s brother [Pete] was going to be the star in the new show. [Richard] got mad at his brother [Pete] after he stole his pretzels. [Richard] and his sister [Carrie] were twins. Still, they did n't look very much alike.
[{('Anna', 'sister', 'Carrie'): [('Anna', 'brother', 'Richard'), ('Richard', 'sister', 'Carrie')]}, {('Anna', 'brother', 'Richard'): [('Anna', 'brother', 'Pete'), ('Pete', 'brother', 'Richard')]}]
['brother', 'brother', 'sister']