story: [Michelle] and her sister [Sandra] went to the basketball game. [Michelle] invited [Alan] to meet them there, since she is his sister. [Marian] does n't like having to babysit her younger brother, [Alan].
query: ('Marian', 'Sandra')
clean_story: [Marian] does n't like having to babysit her younger brother, [Alan]. [Michelle] and her sister [Sandra] went to the basketball game. [Michelle] invited [Alan] to meet them there, since she is his sister.
proof_state: [{('Marian', 'sister', 'Sandra'): [('Marian', 'sister', 'Michelle'), ('Michelle', 'sister', 'Sandra')]}, {('Marian', 'sister', 'Michelle'): [('Marian', 'brother', 'Alan'), ('Alan', 'sister', 'Michelle')]}]