story: [Sherman] and his grandmother [Nettie] went to the science museum. They both had fun, and learned some things, too. [David] was disappointed that his father, [Stephen], would n't be at the play to see him perform. [Nettie] and her son [Stephen] traveled around the world [Sherman] took his son [Stephen] out to play gold later that night. [Cecilia] loves cooking for her son. His name is [David]
clean_story: [Cecilia] loves cooking for her son. His name is [David] [David] was disappointed that his father, [Stephen], would n't be at the play to see him perform. [Nettie] and her son [Stephen] traveled around the world
proof_state: [{('Cecilia', 'mother', 'Nettie'): [('Cecilia', 'son', 'David'), ('David', 'grandmother', 'Nettie')]}, {('David', 'grandmother', 'Nettie'): [('David', 'father', 'Stephen'), ('Stephen', 'mother', 'Nettie')]}]