story: [Antonio] and his grandson [Todd] went to the zoo, and had a great time together. [Elizabeth] asked her mother [Patricia] on a good school for [James] and [Elizabeth]'s son [Frank].
clean_story: [Elizabeth] asked her mother [Patricia] on a good school for [James] and [Elizabeth]'s son [Frank].
proof_state: [{('James', 'mother', 'Patricia'): [('James', 'son', 'Frank'), ('Frank', 'grandmother', 'Patricia')]}, {('James', 'son', 'Frank'): [('James', 'wife', 'Elizabeth'), ('Elizabeth', 'son', 'Frank')]}]