[Pedro] bought flowers for his wife [Dorothy]. [Rebecca] ca n't wait to see her favorite aunt [Tracy]. [Pedro] has a daughter named [Rebecca] who visits him every Sunday for dinner. [Marie] and her sister [Tracy] braided each other's hair before school.
('Dorothy', 'Marie')
[Pedro] bought flowers for his wife [Dorothy]. [Pedro] has a daughter named [Rebecca] who visits him every Sunday for dinner. [Rebecca] ca n't wait to see her favorite aunt [Tracy]. [Marie] and her sister [Tracy] braided each other's hair before school.
[{('Dorothy', 'sister', 'Marie'): [('Dorothy', 'sister', 'Tracy'), ('Tracy', 'sister', 'Marie')]}, {('Dorothy', 'sister', 'Tracy'): [('Dorothy', 'daughter', 'Rebecca'), ('Rebecca', 'aunt', 'Tracy')]}, {('Dorothy', 'daughter', 'Rebecca'): [('Dorothy', 'husband', 'Pedro'), ('Pedro', 'daughter', 'Rebecca')]}]
['husband', 'daughter', 'aunt', 'sister']