[Robert] called his brother, [Louis], to chat. [Pedro], [Louis]'s brother, had gotten into a fight with his sister, [Tracy], and it was causing problems. [Tracy], [Bobby] mother, likes to take him to eat ice cream on Sundays.
('Bobby', 'Robert')
[Tracy], [Bobby] mother, likes to take him to eat ice cream on Sundays. [Robert] called his brother, [Louis], to chat. [Pedro], [Louis]'s brother, had gotten into a fight with his sister, [Tracy], and it was causing problems.
[{('Bobby', 'uncle', 'Robert'): [('Bobby', 'mother', 'Tracy'), ('Tracy', 'brother', 'Robert')]}, {('Tracy', 'brother', 'Robert'): [('Tracy', 'brother', 'Louis'), ('Louis', 'brother', 'Robert')]}, {('Tracy', 'brother', 'Louis'): [('Tracy', 'brother', 'Pedro'), ('Pedro', 'brother', 'Louis')]}]
['mother', 'brother', 'brother', 'brother']