story: [Stanley]'s daughter [Sandra] and other daughter [Marian] met [Marian]'s brother, [Michael], at the park.
query: ('Michael', 'Sandra')
clean_story: [Stanley]'s daughter [Sandra] and other daughter [Marian] met [Marian]'s brother, [Michael], at the park.
proof_state: [{('Michael', 'sister', 'Sandra'): [('Michael', 'father', 'Stanley'), ('Stanley', 'daughter', 'Sandra')]}, {('Michael', 'father', 'Stanley'): [('Michael', 'sister', 'Marian'), ('Marian', 'father', 'Stanley')]}]