story: [Alverta]'s son, [Alex], had to stay home from school with a cold. [Nancy] and her aunt, [Dawn], went to the bookstore. [Nancy] bought some fantasy books, while [Dawn] picked up some mysteries. [Patricia] and her daughter [Elizabeth] went to see a movie yesterday and then got ice cream afterwards. [Elizabeth] went shoe shopping with her sister [Alverta].
clean_story: [Alverta]'s son, [Alex], had to stay home from school with a cold. [Elizabeth] went shoe shopping with her sister [Alverta]. [Patricia] and her daughter [Elizabeth] went to see a movie yesterday and then got ice cream afterwards.
proof_state: [{('Alex', 'grandmother', 'Patricia'): [('Alex', 'mother', 'Alverta'), ('Alverta', 'mother', 'Patricia')]}, {('Alverta', 'mother', 'Patricia'): [('Alverta', 'sister', 'Elizabeth'), ('Elizabeth', 'mother', 'Patricia')]}]