[James] and his sister [Rebecca] took their father out to eat for his birthday. They had a great time. [Dorothy] took her daughter, [Rebecca], to lunch. [Jeffrey] and his brother [James] went to the boxing match. [Cheryl] was upset her brother [Jeffrey] did n't invite her.
('Cheryl', 'Dorothy')
[Jeffrey] and his brother [James] went to the boxing match. [Cheryl] was upset her brother [Jeffrey] did n't invite her. [James] and his sister [Rebecca] took their father out to eat for his birthday. They had a great time. [Dorothy] took her daughter, [Rebecca], to lunch.
[{('Cheryl', 'mother', 'Dorothy'): [('Cheryl', 'brother', 'Jeffrey'), ('Jeffrey', 'mother', 'Dorothy')]}, {('Jeffrey', 'mother', 'Dorothy'): [('Jeffrey', 'brother', 'James'), ('James', 'mother', 'Dorothy')]}, {('James', 'mother', 'Dorothy'): [('James', 'sister', 'Rebecca'), ('Rebecca', 'mother', 'Dorothy')]}]
['brother', 'brother', 'sister', 'mother']