[Dorothy] drove her son [James] to his soccer game. [Dorothy] could n't wait to get off the plane to see her mother, [Rebecca]. [Pedro] and his daughter [Cheryl] helped to make Thanksgiving dinner together. [Pedro] is proud of his son. His name is [James].
('Rebecca', 'Cheryl')
[Dorothy] could n't wait to get off the plane to see her mother, [Rebecca]. [Dorothy] drove her son [James] to his soccer game. [Pedro] is proud of his son. His name is [James]. [Pedro] and his daughter [Cheryl] helped to make Thanksgiving dinner together.
[{('Rebecca', 'sister', 'Cheryl'): [('Rebecca', 'brother', 'James'), ('James', 'sister', 'Cheryl')]}, {('James', 'sister', 'Cheryl'): [('James', 'father', 'Pedro'), ('Pedro', 'daughter', 'Cheryl')]}, {('Rebecca', 'brother', 'James'): [('Rebecca', 'mother', 'Dorothy'), ('Dorothy', 'son', 'James')]}]
['mother', 'son', 'father', 'daughter']