[Bettie] invited her mother [Tracy] and brother [Bobby] to the show. [Tracy]'s brother [Robert] was at the show when they showed up. [Pedro] and his brother [Robert] had a fight. They did n't speak to each other for a whole week afterwards.
('Bobby', 'Pedro')
[Bettie] invited her mother [Tracy] and brother [Bobby] to the show. [Tracy]'s brother [Robert] was at the show when they showed up. [Pedro] and his brother [Robert] had a fight. They did n't speak to each other for a whole week afterwards.
[{('Bobby', 'uncle', 'Pedro'): [('Bobby', 'mother', 'Tracy'), ('Tracy', 'brother', 'Pedro')]}, {('Bobby', 'mother', 'Tracy'): [('Bobby', 'sister', 'Bettie'), ('Bettie', 'mother', 'Tracy')]}, {('Tracy', 'brother', 'Pedro'): [('Tracy', 'brother', 'Robert'), ('Robert', 'brother', 'Pedro')]}]
['sister', 'mother', 'brother', 'brother']