[Pedro] and his brother [Robert] were watching the hockey game with [Robert]'s son [Ronald]. [Robert] then got a call from his sister [Tracy] asking if they would like to come over for dessert. [Louis] was in the backyard throwing the baseball around with his uncle [Ronald].
('Tracy', 'Louis')
[Pedro] and his brother [Robert] were watching the hockey game with [Robert]'s son [Ronald]. [Robert] then got a call from his sister [Tracy] asking if they would like to come over for dessert. [Louis] was in the backyard throwing the baseball around with his uncle [Ronald].
[{('Tracy', 'brother', 'Louis'): [('Tracy', 'brother', 'Robert'), ('Robert', 'brother', 'Louis')]}, {('Tracy', 'brother', 'Robert'): [('Tracy', 'brother', 'Pedro'), ('Pedro', 'brother', 'Robert')]}, {('Robert', 'brother', 'Louis'): [('Robert', 'son', 'Ronald'), ('Ronald', 'uncle', 'Louis')]}]
['brother', 'brother', 'son', 'uncle']