story: [Myrna] took her daughter [Lucille] to visit [Lucille]'s grandfather, [Jason].
query: ('Myrna', 'Jason')
clean_story: [Myrna] took her daughter [Lucille] to visit [Lucille]'s grandfather, [Jason].
proof_state: [{('Myrna', 'father', 'Jason'): [('Myrna', 'daughter', 'Lucille'), ('Lucille', 'grandfather', 'Jason')]}]