story: [Alfred] took his mom [Myrna] and sister [Anna] to the movies.
query: ('Myrna', 'Anna')
clean_story: [Alfred] took his mom [Myrna] and sister [Anna] to the movies.
proof_state: [{('Myrna', 'daughter', 'Anna'): [('Myrna', 'son', 'Alfred'), ('Alfred', 'sister', 'Anna')]}]