[Tracy] took her son, [Kevin], to the movie theater for his birthday. [Kevin] and his sister [Erika] were twins. Still, they did n't look very much alike. [Pedro] took his niece [Erika] to the park to walk her dog. [Pedro] and his sister [Marie] went to the ice skating rink. [Pedro] fell down and [Marie] laughed at him.
('Tracy', 'Marie')
[Tracy] took her son, [Kevin], to the movie theater for his birthday. [Kevin] and his sister [Erika] were twins. Still, they did n't look very much alike. [Pedro] took his niece [Erika] to the park to walk her dog. [Pedro] and his sister [Marie] went to the ice skating rink. [Pedro] fell down and [Marie] laughed at him.
[{('Tracy', 'sister', 'Marie'): [('Tracy', 'brother', 'Pedro'), ('Pedro', 'sister', 'Marie')]}, {('Tracy', 'brother', 'Pedro'): [('Tracy', 'daughter', 'Erika'), ('Erika', 'uncle', 'Pedro')]}, {('Tracy', 'daughter', 'Erika'): [('Tracy', 'son', 'Kevin'), ('Kevin', 'sister', 'Erika')]}]
['son', 'sister', 'uncle', 'sister']