story: [Anna] and her brother [William] went to the movies together. [Anna]'s mom, [Myrna], has recently taken art classes.
query: ('William', 'Myrna')
clean_story: [Anna] and her brother [William] went to the movies together. [Anna]'s mom, [Myrna], has recently taken art classes.
proof_state: [{('William', 'mother', 'Myrna'): [('William', 'sister', 'Anna'), ('Anna', 'mother', 'Myrna')]}]