[James] was so proud of his daughter, [Lynn], graduating at the top of her class. [Bobby]'s father, [Hugh], bought him some ice cream. [Hugh] asked his father, [James], to help him with his math homework. [James] could n't, because he was lousy at math himself.
('Bobby', 'Lynn')
[Bobby]'s father, [Hugh], bought him some ice cream. [Hugh] asked his father, [James], to help him with his math homework. [James] could n't, because he was lousy at math himself. [James] was so proud of his daughter, [Lynn], graduating at the top of her class.
[{('Bobby', 'aunt', 'Lynn'): [('Bobby', 'father', 'Hugh'), ('Hugh', 'sister', 'Lynn')]}, {('Hugh', 'sister', 'Lynn'): [('Hugh', 'father', 'James'), ('James', 'daughter', 'Lynn')]}]
['father', 'father', 'daughter']