[Tracy] and her daughter [Erika] went out to dinner. [Dorothy] took her nephew [Kevin] to see a movie last Saturday. They had a good time. [Kevin] took a cab to the mall with his sister [Emma]. [Emma]'s sister [Erika] drove herself there.
('Tracy', 'Dorothy')
[Tracy] and her daughter [Erika] went out to dinner. [Kevin] took a cab to the mall with his sister [Emma]. [Emma]'s sister [Erika] drove herself there. [Dorothy] took her nephew [Kevin] to see a movie last Saturday. They had a good time.
[{('Tracy', 'sister', 'Dorothy'): [('Tracy', 'son', 'Kevin'), ('Kevin', 'aunt', 'Dorothy')]}, {('Tracy', 'son', 'Kevin'): [('Tracy', 'daughter', 'Erika'), ('Erika', 'brother', 'Kevin')]}, {('Erika', 'brother', 'Kevin'): [('Erika', 'sister', 'Emma'), ('Emma', 'brother', 'Kevin')]}]
['daughter', 'sister', 'brother', 'aunt']