[Aaron] tripped his brother [Bernardo] in the living room. [Bettie] and her brother [Bobby] sat down together to clip coupons. [Tracy] took her son [Aaron] and her daughter [Bettie] to get fast food because they were well behaved.
('Bobby', 'Bernardo')
[Bettie] and her brother [Bobby] sat down together to clip coupons. [Tracy] took her son [Aaron] and her daughter [Bettie] to get fast food because they were well behaved. [Aaron] tripped his brother [Bernardo] in the living room.
[{('Bobby', 'brother', 'Bernardo'): [('Bobby', 'sister', 'Bettie'), ('Bettie', 'brother', 'Bernardo')]}, {('Bettie', 'brother', 'Bernardo'): [('Bettie', 'brother', 'Aaron'), ('Aaron', 'brother', 'Bernardo')]}, {('Bettie', 'brother', 'Aaron'): [('Bettie', 'mother', 'Tracy'), ('Tracy', 'son', 'Aaron')]}]
['sister', 'mother', 'son', 'brother']