[Robert] took his sister [Dorothy] to the zoo. [Robert] 'son [Ronald] did n't go because he is afraid of animals. [Shantel] and her son [Antonio] went to the zoo and then out to dinner yesterday. [Antonio] is a factory worker. He has a wonderful sister by the name of [Dorothy].
('Shantel', 'Ronald')
[Shantel] and her son [Antonio] went to the zoo and then out to dinner yesterday. [Antonio] is a factory worker. He has a wonderful sister by the name of [Dorothy]. [Robert] took his sister [Dorothy] to the zoo. [Robert] 'son [Ronald] did n't go because he is afraid of animals.
[{('Shantel', 'grandson', 'Ronald'): [('Shantel', 'son', 'Robert'), ('Robert', 'son', 'Ronald')]}, {('Shantel', 'son', 'Robert'): [('Shantel', 'son', 'Antonio'), ('Antonio', 'brother', 'Robert')]}, {('Antonio', 'brother', 'Robert'): [('Antonio', 'sister', 'Dorothy'), ('Dorothy', 'brother', 'Robert')]}]
['son', 'sister', 'brother', 'son']