[Tracy]'s brother [Louis] took her to the fair when she was little. [Louis] also brought his brother [Antonio]. [Dorothy] borrowed some money from her brother [Robert]. [Robert] and his sister [Tracy] love to play video games.
('Dorothy', 'Antonio')
[Dorothy] borrowed some money from her brother [Robert]. [Robert] and his sister [Tracy] love to play video games. [Tracy]'s brother [Louis] took her to the fair when she was little. [Louis] also brought his brother [Antonio].
[{('Dorothy', 'brother', 'Antonio'): [('Dorothy', 'brother', 'Robert'), ('Robert', 'brother', 'Antonio')]}, {('Robert', 'brother', 'Antonio'): [('Robert', 'brother', 'Louis'), ('Louis', 'brother', 'Antonio')]}, {('Robert', 'brother', 'Louis'): [('Robert', 'sister', 'Tracy'), ('Tracy', 'brother', 'Louis')]}]
['brother', 'sister', 'brother', 'brother']