[Robert] bought a book for his son [John]. [Tracy] invited her mother, [Shantel], to dinner and extended the invitation to [Shantel]'s son, [Louis]. [Tracy]'s brother [Robert] and her went to get ice cream.
('John', 'Louis')
[Robert] bought a book for his son [John]. [Tracy]'s brother [Robert] and her went to get ice cream. [Tracy] invited her mother, [Shantel], to dinner and extended the invitation to [Shantel]'s son, [Louis].
[{('John', 'uncle', 'Louis'): [('John', 'father', 'Robert'), ('Robert', 'brother', 'Louis')]}, {('Robert', 'brother', 'Louis'): [('Robert', 'mother', 'Shantel'), ('Shantel', 'son', 'Louis')]}, {('Robert', 'mother', 'Shantel'): [('Robert', 'sister', 'Tracy'), ('Tracy', 'mother', 'Shantel')]}]
['father', 'sister', 'mother', 'son']