story: [Teresa] is a daughter of [Sandra], she had to be watched by a babysitter while [Marian] and [Sandra] went to dinner. [Marian] is a sister of [Alan]. [Sandra] is a sister of [Marian].
query: ('Alan', 'Teresa')
clean_story: [Teresa] is a daughter of [Sandra], she had to be watched by a babysitter while [Marian] and [Sandra] went to dinner. [Marian] is a sister of [Alan]. [Sandra] is a sister of [Marian].
proof_state: [{('Alan', 'niece', 'Teresa'): [('Alan', 'sister', 'Sandra'), ('Sandra', 'daughter', 'Teresa')]}, {('Alan', 'sister', 'Sandra'): [('Alan', 'sister', 'Marian'), ('Marian', 'sister', 'Sandra')]}]