[Tracy] baked a cake for her son [Kevin]. [Harold] is the proud father of the lovely [Antonio] [Beverly] is the happy daughter of her adoring father [Harold]. [Kevin] asked his father, [Antonio], to help him with his math homework. [Antonio] could n't, because he was lousy at math himself.
('Tracy', 'Beverly')
[Tracy] baked a cake for her son [Kevin]. [Kevin] asked his father, [Antonio], to help him with his math homework. [Antonio] could n't, because he was lousy at math himself. [Harold] is the proud father of the lovely [Antonio] [Beverly] is the happy daughter of her adoring father [Harold].
[{('Tracy', 'sister', 'Beverly'): [('Tracy', 'son', 'Kevin'), ('Kevin', 'aunt', 'Beverly')]}, {('Kevin', 'aunt', 'Beverly'): [('Kevin', 'father', 'Antonio'), ('Antonio', 'sister', 'Beverly')]}, {('Antonio', 'sister', 'Beverly'): [('Antonio', 'father', 'Harold'), ('Harold', 'daughter', 'Beverly')]}]
['son', 'father', 'father', 'daughter']