[Hugh]'s sister, [Lynn], was crying, so he told her a joke. She laughed, and felt better. [Cindy] took her sister [Lynn] out for dinner to celebrate her birthday. [Hugh] bought a book for his son [Bobby].
('Bobby', 'Cindy')
[Hugh] bought a book for his son [Bobby]. [Hugh]'s sister, [Lynn], was crying, so he told her a joke. She laughed, and felt better. [Cindy] took her sister [Lynn] out for dinner to celebrate her birthday.
[{('Bobby', 'aunt', 'Cindy'): [('Bobby', 'father', 'Hugh'), ('Hugh', 'sister', 'Cindy')]}, {('Hugh', 'sister', 'Cindy'): [('Hugh', 'sister', 'Lynn'), ('Lynn', 'sister', 'Cindy')]}]
['father', 'sister', 'sister']