[Tracy] gave her brother [Pedro] a new sweater for Christmas. [Pedro] always enjoyed playing with his sister, [Tracy], when they were growing up. [Pedro] played catch with his dad, [Harold] [Marie] and her brother [Pedro] are both adopted from the same family.
('Harold', 'Marie')
[Pedro] played catch with his dad, [Harold] [Pedro] always enjoyed playing with his sister, [Tracy], when they were growing up. [Tracy] gave her brother [Pedro] a new sweater for Christmas. [Marie] and her brother [Pedro] are both adopted from the same family.
[{('Harold', 'daughter', 'Marie'): [('Harold', 'daughter', 'Tracy'), ('Tracy', 'sister', 'Marie')]}, {('Tracy', 'sister', 'Marie'): [('Tracy', 'brother', 'Pedro'), ('Pedro', 'sister', 'Marie')]}, {('Harold', 'daughter', 'Tracy'): [('Harold', 'son', 'Pedro'), ('Pedro', 'sister', 'Tracy')]}]
['son', 'sister', 'brother', 'sister']