[Marie] invited her sisters, [Dorothy] and [Tracy], to a party. [Pedro] went to the Friday night baseball game with his son, [James]. [Dorothy], [Pedro]'s wife, met them there after she was finished at work.
('Tracy', 'James')
[Marie] invited her sisters, [Dorothy] and [Tracy], to a party. [Pedro] went to the Friday night baseball game with his son, [James]. [Dorothy], [Pedro]'s wife, met them there after she was finished at work.
[{('Tracy', 'nephew', 'James'): [('Tracy', 'sister', 'Dorothy'), ('Dorothy', 'son', 'James')]}, {('Dorothy', 'son', 'James'): [('Dorothy', 'husband', 'Pedro'), ('Pedro', 'son', 'James')]}, {('Tracy', 'sister', 'Dorothy'): [('Tracy', 'sister', 'Marie'), ('Marie', 'sister', 'Dorothy')]}]
['sister', 'sister', 'husband', 'son']