[Robert]'s son, [Allan], loves going to the zoo with his grandmother [Shantel]. [Tracy]'s son, [Kevin], went with her to the store to buy candy for Halloween. [Shantel] took her daughter, [Tracy], out to High Tea yesterday afternoon.
('Robert', 'Kevin')
[Robert]'s son, [Allan], loves going to the zoo with his grandmother [Shantel]. [Shantel] took her daughter, [Tracy], out to High Tea yesterday afternoon. [Tracy]'s son, [Kevin], went with her to the store to buy candy for Halloween.
[{('Robert', 'nephew', 'Kevin'): [('Robert', 'sister', 'Tracy'), ('Tracy', 'son', 'Kevin')]}, {('Robert', 'sister', 'Tracy'): [('Robert', 'mother', 'Shantel'), ('Shantel', 'daughter', 'Tracy')]}, {('Robert', 'mother', 'Shantel'): [('Robert', 'son', 'Allan'), ('Allan', 'grandmother', 'Shantel')]}]
['son', 'grandmother', 'daughter', 'son']