story: [Cecilia] had a daughter named [Leah]. [Cecilia] had a daughter named [Peggy]. [Nettie] took her daughter [Mary] to the park. [Mary] was sad her sister [Cecilia] could not join. [Leah] and her sister, [Peggy], frequently bicker. However, they always make up quickly.
clean_story: [Cecilia] had a daughter named [Peggy]. [Nettie] took her daughter [Mary] to the park. [Mary] was sad her sister [Cecilia] could not join.
proof_state: [{('Peggy', 'grandmother', 'Nettie'): [('Peggy', 'mother', 'Cecilia'), ('Cecilia', 'mother', 'Nettie')]}, {('Cecilia', 'mother', 'Nettie'): [('Cecilia', 'sister', 'Mary'), ('Mary', 'mother', 'Nettie')]}]