[Pedro] braided his sister [Tracy]'s hair. [Pedro] invited his nephew, [Wayne] to the baseball game. [Beverly]'s son [Wayne] and brother [Robert] came to her birthday party last weekend.
('Robert', 'Tracy')
[Beverly]'s son [Wayne] and brother [Robert] came to her birthday party last weekend. [Pedro] invited his nephew, [Wayne] to the baseball game. [Pedro] braided his sister [Tracy]'s hair.
[{('Robert', 'sister', 'Tracy'): [('Robert', 'sister', 'Beverly'), ('Beverly', 'sister', 'Tracy')]}, {('Beverly', 'sister', 'Tracy'): [('Beverly', 'brother', 'Pedro'), ('Pedro', 'sister', 'Tracy')]}, {('Beverly', 'brother', 'Pedro'): [('Beverly', 'son', 'Wayne'), ('Wayne', 'uncle', 'Pedro')]}]
['sister', 'son', 'uncle', 'sister']